{"id":440,"date":"2026-02-28T11:16:52","date_gmt":"2026-02-28T03:16:52","guid":{"rendered":"https:\/\/blog.kingster.cn\/?p=440"},"modified":"2026-02-28T11:16:52","modified_gmt":"2026-02-28T03:16:52","slug":"100-sql-server-mistakes-and-how-to-avoid-them-chapter3-datatype","status":"publish","type":"post","link":"https:\/\/blog.kingster.cn\/index.php\/2026\/02\/28\/100-sql-server-mistakes-and-how-to-avoid-them-chapter3-datatype\/","title":{"rendered":"\u8bfb\u4e66\u300a100 SQL Server Mistakes and How to Avoid Them\u300b\u7b2c\u4e09\u7ae0 \u6570\u636e\u7c7b\u578b"},"content":{"rendered":"<p><strong><span style=\"font-size: 14pt;\">\u7b2c\u4e09\u7ae0 \u6570\u636e\u7c7b\u578b<\/span><\/strong><\/p>\n<p><strong>\u672c\u7ae0\u5185\u5bb9\u5305\u62ec\uff1a<\/strong><\/p>\n<ul>\n<li>\u6570\u636e\u7c7b\u578b\u7684\u91cd\u8981\u6027<\/li>\n<li>\u4f7f\u7528\u9519\u8bef\u6807\u51c6\u6570\u636e\u7c7b\u578b\u7684\u540e\u679c<\/li>\n<li>\u4f7f\u7528\u9ad8\u7ea7\u6570\u636e\u7c7b\u578b\u7684\u539f\u56e0<\/li>\n<li>\u5904\u7406 XML \u548c JSON \u6570\u636e\u7684\u597d\u5904<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>\u9519\u8bef6# \u59cb\u7ec8\u5c06\u6574\u6570\u5b58\u50a8\u4e3a INT<\/strong><\/p>\n<p>\u60f3\u8c61\u4e00\u4e0b\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u5927\u578b\u6570\u636e\u4ed3\u5e93\u3002\u4e00\u4e2a\u4e8b\u5b9e\u8868\u670910\u4ebf\u884c\uff0c\u5e76\u4e14\u4e0e\u4e94\u4e2a\u7ef4\u5ea6\u8868\u5173\u8054\uff0c\u8fd9\u4e9b\u7ef4\u5ea6\u8868\u5404\u670930,000\u884c\u3002\u7531\u4e8e\u7f13\u51b2\u533a\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u91cf\u5927\uff0c\u6027\u80fd\u5f88\u5dee\u4e14\u5185\u5b58\u603b\u662f\u6ee1\u7684\u3002\u5f53\u67e5\u8be2\u8fd0\u884c\u65f6\uff0c\u5927\u91cf\u6570\u636e\u88ab\u5199\u5165TempDB\u3002\u6211\u4eec\u5df2\u7ecf\u4f18\u5316\u4e86\u67e5\u8be2\uff0c\u4e5f\u5df2\u7ecf\u5ba1\u67e5\u4e86\u7d22\u5f15\u7b56\u7565\uff0c\u5e76\u786e\u4fdd\u7d22\u5f15\u548c\u7edf\u8ba1\u4fe1\u606f\u90fd\u5f97\u5230\u4e86\u826f\u597d\u7684\u7ef4\u62a4\u3002\u770b\u8d77\u6765\u552f\u4e00\u80fd\u505a\u7684\u4e8b\u60c5\u5c31\u662f\u589e\u52a0\u66f4\u591a\u7684\u786c\u4ef6\uff0c\u4f46\u6839\u636e\u8fc7\u53bb\u4e24\u5e74\u7684\u8d8b\u52bf\uff0c\u6211\u4eec\u6000\u7591\u5982\u679c\u589e\u52a0\u66f4\u591a\u7684\u5185\u5b58\uff0c\u53ea\u4f1a\u5c06\u95ee\u9898\u63a8\u5230\u4e0b\u4e00\u9636\u6bb5\u3002\u6211\u4eec\u5e94\u8be5\u600e\u4e48\u505a\uff1f\u4e00\u4e2a\u8d77\u70b9\u662f\u8003\u8651\u5ba1\u67e5\u6211\u4eec\u7684\u6570\u503c\u6570\u636e\u7c7b\u578b\uff0c\u7279\u522b\u662f\u90a3\u4e9b\u5728\u4e3b\u952e\/\u5916\u952e\u5173\u7cfb\u4e2d\u4f7f\u7528\u7684\u7c7b\u578b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>INT \u662f SQL Server \u4e2d\u4f7f\u7528\u6700\u5e7f\u6cdb\u4f46\u4e5f\u6700\u5bb9\u6613\u88ab\u8bef\u7528\u7684\u6570\u636e\u7c7b\u578b\u3002\u5b9e\u9645\u4e0a\uff0c\u6211\u4eec\u6709\u56db\u79cd\u4e13\u95e8\u7528\u4e8e\u5b58\u50a8\u6574\u6570\u7684\u6570\u636e\u7c7b\u578b\u3002\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u5728\u8868\u4e2d\u6709\u8be6\u7ec6\u8bf4\u660e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u6574\u6570\u7c7b\u578b<\/strong><\/p>\n<p>&nbsp;<\/p>\n<table width=\"100%\">\n<thead>\n<tr>\n<td>Data type<\/td>\n<td>Range<\/td>\n<td>Size (Bytes)<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>TINYINT<\/td>\n<td>0 to 255<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>SMALLINT<\/td>\n<td>\u201332,768 to 32,767<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>INT<\/td>\n<td>\u20132,147,483,648 to 2,147,483,647<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>BIGINT<\/td>\n<td>\u20139,223,372,036,854,775,808 to 9,223,372,036,854,775,807<\/td>\n<td>8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<blockquote><p>SELECT<\/p>\n<p>DATALENGTH(CAST(1 AS TINYINT)) AS TinyIntSize<\/p>\n<p>, DATALENGTH(CAST(1 AS SMALLINT)) AS SmallIntSize<\/p>\n<p>, DATALENGTH(CAST(1 AS INT)) AS IntSize<\/p>\n<p>, DATALENGTH(CAST(1 AS BIGINT)) AS BigIntSize ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>TinyIntSize\u00a0\u00a0\u00a0 SmallIntSize\u00a0\u00a0\u00a0 IntSize\u00a0\u00a0\u00a0 BigIntSize<\/p>\n<p>1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8<\/p>\n<p>&nbsp;<\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u7684\u4e94\u4e2a\u7ef4\u5ea6\u8868\u5728\u5176\u4e3b\u952e\u5217\u4e2d\u4f7f\u7528 INT \u7c7b\u578b\u3002\u6bcf\u4e2a\u7ef4\u5ea6\u8868\u6709 30,000 \u884c\uff0c\u800c SMALLINT \u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u8868\u793a\u7684\u6b63\u503c\u8d85\u8fc7 32,000\u3002\u8fd9\u610f\u5473\u7740\u5982\u679c\u6211\u4eec\u9884\u671f\u7ef4\u5ea6\u4e0d\u4f1a\u5927\u5e45\u589e\u957f\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u5728\u6bcf\u884c\u4e2d\u8282\u7701 2 \u4e2a\u5b57\u8282\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6b64\u65f6\uff0c\u4f60\u53ef\u80fd\u4f1a\u60f3\uff0c\u201c\u6211\u4eec\u4e3a\u4ec0\u4e48\u8981\u5728\u610f\u8282\u77012\u5b57\u8282\u5462\uff1f\u201d\u8fd9\u4e2a\u95ee\u9898\u7684\u7b54\u6848\u9700\u8981\u4e00\u4e9b\u7b80\u5355\u7684\u6570\u5b66\u3002\u6bcf\u4e2a\u4e94\u4e2a\u7ef4\u5ea6\u8868\u4e2d\u90fd\u670930,000\u884c\u3002\u901a\u8fc7\u6539\u7528 SMALLINT\uff0c\u6bcf\u4e2a\u8868\u6211\u4eec\u53ea\u4f1a\u8282\u7701 58 KB\u3002\u4f46\u6211\u4eec\u7684\u4e8b\u5b9e\u8868\u6709 10 \u4ebf\u884c\u3002\u8fd9\u610f\u5473\u7740\u6bcf\u4e2a\u952e\u53ef\u4ee5\u8282\u7701 1.86 GB\u3002\u5c06\u5176\u4e58\u4ee5\u4e94\u4e2a\u7ef4\u5ea6\u8868\uff0c\u8fd9\u610f\u5473\u7740\u5bf9\u4e8e\u6bcf\u4e2a\u67e5\u8be2\u6d89\u53ca\u4e8b\u5b9e\u8868\u7684\u6240\u6709\u884c\u548c\u6240\u6709\u4e94\u4e2a\u952e\uff0c\u6211\u4eec\u5c06\u8282\u7701 9.3 GB\u3002\u518d\u5c06\u5176\u6269\u5c55\u5230\u6570\u636e\u4ed3\u5e93\u4e2d\u7684\u516b\u4e2a\u4e8b\u5b9e\u8868\u3002\u6211\u4eec\u8fd8\u5e94\u8003\u8651\u7d22\u5f15\u7684\u5927\u5c0f\uff0c\u8fd9\u4e9b\u7d22\u5f15\u662f\u5efa\u7acb\u5728\u8fd9\u4e9b\u5916\u952e\u5217\u4e0a\u7684\u3002\u73b0\u5728\u8003\u8651\u8fd0\u884c\u4e0d\u540c\u67e5\u8be2\u7684\u5e76\u884c\u4f1a\u8bdd\u3002\u7a81\u7136\u95f4\uff0c\u6211\u4eec\u7684\u6570\u636e\u7c7b\u578b\u9009\u62e9\u5bf9\u5185\u5b58\u6d88\u8017\u4ea7\u751f\u4e86\u76f4\u63a5\u4e14\u663e\u8457\u7684\u5f71\u54cd\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u9519\u8bef7# \u59cb\u7ec8\u4f7f\u7528\u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\u4e32<\/strong><\/p>\n<p>\u60f3\u8c61\u4e00\u4e0b\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u5b58\u50a8\u7f8e\u56fd\u5730\u5740\u7684\u8868\u3002\u6211\u4eec\u6b63\u52aa\u529b\u786e\u4fdd\u6570\u636e\u5c3d\u53ef\u80fd\u8282\u7701\u7a7a\u95f4\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5bf9\u6240\u6709\u5217\u4f7f\u7528\u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\u4e32\uff0c\u5305\u62ec\u5730\u5740\u7684\u6bcf\u4e00\u884c\u4ee5\u53ca\u90ae\u653f\u7f16\u7801\u3002\u6211\u4eec\u77e5\u9053\u7f05\u56e0\u5dde\u7684 Mooselookmeguntic \u5e02\u548c\u5bbe\u5915\u6cd5\u5c3c\u4e9a\u5dde\u7684 Kleinfeltersville \u5e02\u62e5\u6709\u7f8e\u56fd\u6700\u957f\u7684\u57ce\u5e02\u540d\u79f0\uff0c\u6bcf\u4e2a\u90fd\u6709 17 \u4e2a\u5b57\u7b26\uff0c\u6240\u4ee5\u6211\u4eec\u5c06 CityName \u5217\u8bbe\u7f6e\u4e3a VARCHAR(17)\u3002\u6211\u4eec\u77e5\u9053\u7f8e\u56fd\u6700\u957f\u7684\u5dde\u540d\u662f Rhode Island and Providence Plantations\uff0c\u6240\u4ee5\u6211\u4eec\u5c06 state \u5217\u8bbe\u7f6e\u4e3a VARCHAR(48)\u3002\u6211\u4eec\u77e5\u9053\u90ae\u653f\u7f16\u7801\u6b63\u597d\u662f 10 \u4e2a\u5b57\u7b26\uff0c\u4f46\u56e0\u4e3a\u6211\u4eec\u77e5\u9053\u6bcf\u6b21\u957f\u5ea6\u90fd\u76f8\u540c\uff0c\u6211\u4eec\u5e94\u8be5\u4f7f\u7528 VARCHAR(10) \u8fd8\u662f CHAR(10)\uff1f\u8fd9\u771f\u7684\u91cd\u8981\u5417\uff1f\u65e0\u8bba\u54ea\u79cd\u65b9\u5f0f\uff0c\u6570\u636e\u957f\u5ea6\u90fd\u662f 10 \u4e2a\u5b57\u7b26\uff0c\u6240\u4ee5\u5e94\u8be5\u5360\u7528 10 \u4e2a\u5b57\u8282\u7684\u7a7a\u95f4\uff0c\u5bf9\u5417\uff1f\u5982\u679c\u8fd9\u662f\u6b63\u786e\u7684\uff0c\u90a3\u4e48\u6211\u4eec\u4e3a\u4ec0\u4e48\u8fd8\u9700\u8981\u56fa\u5b9a\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\u5462\uff1f\u4e8b\u5b9e\u662f\uff0c\u8fd9\u4e2a\u5047\u8bbe\u5e76\u4e0d\u6b63\u786e\u3002\u8981\u7406\u89e3\u539f\u56e0\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3\u4e00\u4e9b SQL Server \u662f\u5982\u4f55\u5b58\u50a8\u6570\u636e\u7684\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>SQL Server \u5c06\u6570\u636e\u5b58\u50a8\u5728\u4e00\u7cfb\u5217 8 KB \u7684\u9875\u4e2d\uff0c\u6bcf\u516b\u9875\u7ec4\u6210\u4e00\u4e2a 64 KB \u7684\u533a\u5757\uff0c\u8fd9\u901a\u5e38\u662f\u8bfb\u53d6\u7684\u6700\u5c0f\u6570\u636e\u91cf\u3002\u6bcf\u4e2a\u6570\u636e\u9875\u90fd\u6709\u4e00\u4e2a 96 \u5b57\u8282\u7684\u9875\u5934\uff0c\u7528\u4e8e\u5b58\u50a8\u9002\u7528\u4e8e\u6574\u4e2a\u9875\u7684\u4fe1\u606f\uff0c\u4f8b\u5982\u5176\u552f\u4e00 ID \u4ee5\u53ca\u6240\u5c5e\u8868\uff08\u6216\u7d22\u5f15\uff09\u7684\u5bf9\u8c61 ID\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5f62\u6210\u884c\u7684\u6570\u636e\u968f\u540e\u5b58\u50a8\u5728\u9875\u9762\u4e0a\u7684\u69fd\u4e2d\u3002\u7136\u800c\uff0c\u8fd9\u4e9b\u69fd\u4e0d\u4ec5\u5b58\u50a8\u6570\u636e\u3002\u5b83\u4eec\u8fd8\u5fc5\u987b\u5b58\u50a8\u5c11\u91cf\u5143\u6570\u636e\uff0c\u4ee5\u4f7f\u6570\u636e\u6709\u7528\u3002\u8fd9\u4e9b\u5143\u6570\u636e\u5305\u62ec\u5173\u4e8e\u5b58\u50a8\u5728\u8be5\u69fd\u4e2d\u7684\u8bb0\u5f55\u7c7b\u578b\u7684\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u5b83\u662f\u6570\u636e\u8bb0\u5f55\u8fd8\u662f\u7d22\u5f15\u8bb0\u5f55\uff1f\u5b83\u662f\u5426\u5305\u542b\u5e7d\u7075\u6570\u636e\uff08\u5df2\u88ab\u903b\u8f91\u5220\u9664\u4f46\u5c1a\u672a\u5b9e\u9645\u79fb\u9664\u7684\u6570\u636e\uff09\uff1f<\/p>\n<p>&nbsp;<\/p>\n<p>\u5176\u4ed6\u5143\u6570\u636e\u5305\u62ec\u56fa\u5b9a\u957f\u5ea6\u6570\u636e\u7684\u957f\u5ea6\uff08\u8fd9\u4e0d\u4ec5\u5305\u62ec\u56fa\u5b9a\u957f\u5ea6\u7684\u5b57\u7b26\u6570\u636e\uff0c\u8fd8\u5305\u62ec\u6574\u6570\u7b49\u6570\u636e\uff09\u3001\u7528\u4e8e\u8ddf\u8e2a\u53ef\u53d8\u957f\u5ea6\u5217\u662f\u5426\u5305\u542b NULL \u503c\u7684 NULL \u503c\u4f4d\u56fe\uff0c\u4ee5\u53ca\u7248\u672c\u6807\u7b7e\uff0c\u8be5\u6807\u7b7e\u7528\u4e8e\u8bf8\u5982\u5728\u7ebf\u7d22\u5f15\u91cd\u5efa\u6216\u5177\u6709\u4e50\u89c2\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u7684\u4e8b\u52a1\u7b49\u64cd\u4f5c\u3002\u6211\u4eec\u5c06\u5728\u7b2c 10 \u7ae0\u8ba8\u8bba\u9694\u79bb\u7ea7\u522b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7136\u800c\uff0c\u6211\u4eec\u5728\u8fd9\u91cc\u771f\u6b63\u5173\u5fc3\u7684\u5143\u6570\u636e\u90e8\u5206\u662f\u5217\u504f\u79fb\u6570\u7ec4\u3002\u5b83\u7528\u4e8e\u8ddf\u8e2a\u6bcf\u4e2a\u53ef\u53d8\u957f\u5ea6\u5217\u5728\u884c\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002\u7531\u4e8e\u53ef\u53d8\u957f\u5ea6\u6570\u636e\u7684\u957f\u5ea6\u53ef\u4ee5\u662f\u4efb\u610f\u7684\uff0c\u56e0\u6b64\u8fd9\u4e2a\u504f\u79fb\u8868\u662f SQL Server \u533a\u5206\u4e00\u6bb5\u6570\u636e\u7ed3\u675f\u4e0e\u4e0b\u4e00\u6bb5\u6570\u636e\u5f00\u59cb\u7684\u552f\u4e00\u65b9\u5f0f\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6bcf\u4e2a\u53ef\u53d8\u957f\u5ea6\u5217\u5728\u6b64\u8868\u4e2d\u90fd\u9700\u8981\u4e00\u4e2a 2 \u5b57\u8282\u7684\u504f\u79fb\u91cf\uff0c\u8fd9\u610f\u5473\u7740\u6bcf\u4e2a\u53ef\u53d8\u957f\u5ea6\u5217\u6bd4\u56fa\u5b9a\u957f\u5ea6\u5217\u591a\u4f7f\u7528 2 \u5b57\u8282\u7684\u7a7a\u95f4\u3002\u5373\u4f7f\u8be5\u5217\u5b58\u50a8\u7684\u662f NULL \u503c\uff0c\u8fd9\u6761\u89c4\u5219\u4ecd\u7136\u9002\u7528\u3002\u56e0\u6b64\uff0c\u5982\u679c\u6211\u4eec\u5bf9\u90ae\u653f\u7f16\u7801\u4f7f\u7528 CHAR(10)\uff0c\u5b83\u5c06\u5360\u7528 10 \u5b57\u8282\u7684\u7a7a\u95f4\uff0c\u4f46\u5982\u679c\u4f7f\u7528 VARCHAR(10)\uff0c\u5219\u4f1a\u5360\u7528 12 \u5b57\u8282\u7684\u7a7a\u95f4\uff0c\u5c3d\u7ba1\u5b9e\u9645\u6570\u636e\u957f\u5ea6\u4e3a 10 \u5b57\u8282\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u9519\u8bef8# \u7f16\u5199\u4f60\u81ea\u5df1\u7684\u5c42\u7ea7\u4ee3\u7801<\/strong><\/p>\n<p>\u5982\u679c\u6211\u4eec\u67e5\u770b\u5458\u5de5\u8868\uff0c\u53ef\u80fd\u5df2\u7ecf\u610f\u8bc6\u5230 EmployeeID \u548c ManagerID \u5217\u662f\u7528\u6765\u8868\u793a\u5458\u5de5\u5c42\u7ea7\u7684\u3002\u56e0\u6b64\uff0c\u8bf7\u53c2\u8003\u56fe 3.2 \u4e2d\u7684\u7ec4\u7ec7\u67b6\u6784\u56fe\uff0c\u5b83\u5c55\u793a\u4e86 MagicChoc \u9ad8\u7ea7\u7ba1\u7406\u56e2\u961f\u7684\u7ec4\u7ec7\u7ed3\u6784\u3002<\/p>\n<p><a href=\"https:\/\/blog.kingster.cn\/wp-content\/uploads\/2026\/02\/2026022803132639.png\" rel=\"box\" class=\"fancybox\"><img loading=\"lazy\" decoding=\"async\" width=\"554\" height=\"512\" class=\"alignleft size-full wp-image-441\" src=\"https:\/\/blog.kingster.cn\/wp-content\/uploads\/2026\/02\/2026022803132639.png\" alt=\"\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e3a\u4e86\u6f14\u793a\u5982\u4f55\u4f7f\u7528\u4f20\u7edf\u65b9\u6cd5\u6765\u5efa\u6a21\u8fd9\u79cd\u5c42\u6b21\u7ed3\u6784\u2014\u2014\u4ee4\u4eba\u60ca\u8bb6\u7684\u662f\uff0c\u4ecd\u6709\u8bb8\u591a\u5f00\u53d1\u8005\u5728\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u2014\u2014\u6211\u5efa\u8bae\u4f60\u8fd0\u884c\u6e05\u5355 3.6 \u4e2d\u7684\u811a\u672c\uff0c\u5b83\u4f1a\u5c06\u5458\u5de5\u8bb0\u5f55\u63d2\u5165\u5230 Employees \u8868\u4e2d\u3002\u6ce8\u610f ManagerID \u5217\u5305\u542b\u4e86\u4ed6\u4eec\u6240\u6c47\u62a5\u7684\u4eba\u7684 EmployeeID\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>INSERT INTO dbo.Employees (<\/p>\n<p>EmployeeID<\/p>\n<p>, FirstName<\/p>\n<p>, LastName<\/p>\n<p>, DateOfBirth<\/p>\n<p>, EmployeeStartDate<\/p>\n<p>, ManagerID<\/p>\n<p>, Salary<\/p>\n<p>, Department<\/p>\n<p>, DepartmentCode<\/p>\n<p>, Role<\/p>\n<p>, WeeklyContractedHours<\/p>\n<p>, StaffOrContract<\/p>\n<p>, ContractEndDate<\/p>\n<p>)<\/p>\n<p>VALUES<\/p>\n<p>(1, &#8216;Simon&#8217;, &#8216;Gomez&#8217;, &#8216;19691001&#8217;, &#8216;20180101&#8217;, NULL, 980000, &#8216;C-Suite&#8217;, &#8216;CS&#8217;, &#8216;CEO&#8217;, 40, 1, NULL),<\/p>\n<p>(2, &#8216;Sanjay&#8217;, &#8216;Gupta&#8217;, &#8216;19761001&#8217;, &#8216;20180101&#8217;, 1, 640000, &#8216;C-Suite&#8217;, &#8216;CS&#8217;, &#8216;COO&#8217;, 40, 1, NULL),<\/p>\n<p>(3, &#8216;Ed&#8217;, &#8216;Ling&#8217;, &#8216;19690403&#8217;, &#8216;20200801&#8217;, 1, 320000, &#8216;C-Suite&#8217;, &#8216;CS&#8217;, &#8216;CPO&#8217;, 40, 1, NULL),<\/p>\n<p>(4, &#8216;Amanda&#8217;, &#8216;Ballard&#8217;, &#8216;19830401&#8217;, &#8216;20200301&#8217;, 1, 350000, &#8216;C-Suite&#8217;, &#8216;CS&#8217;, &#8216;Sales Director&#8217;, 40, 1, NULL),<\/p>\n<p>&nbsp;<\/p>\n<p>(5, &#8216;Bob&#8217;, &#8216;Walford&#8217;, &#8216;19780908&#8217;, &#8216;20191201&#8217;, 2, 96000, &#8216;Technology&#8217;, &#8216;TE&#8217;, &#8216;Head Of Technology&#8217;, 40, 1, NULL),<\/p>\n<p>(6, &#8216;Brian&#8217;, &#8216;Tilly&#8217;, &#8216;19710102&#8217;, &#8216;20181001&#8217;, 2, 89000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Head Of Manufacturing&#8217;, 40, 1, NULL),<\/p>\n<p>(7, &#8216;Sally&#8217;, &#8216;Nugent&#8217;, &#8216;19790302&#8217;, &#8216;20220601&#8217;, 2, 80000, &#8216;Procurement&#8217;, &#8216;PR&#8217;, &#8216;Head Of Procurement&#8217;, 40, 1, NULL),<\/p>\n<p>(8, &#8216;Jamie&#8217;, &#8216;Briggs&#8217;, &#8216;19900102&#8217;, &#8216;20190601&#8217;, 3, 65000, &#8216;Human Resources&#8217;, &#8216;HR&#8217;, &#8216;HR Manager&#8217;, 40, 1, NULL),<\/p>\n<p>(9, &#8216;Lance&#8217;, &#8216;Bernard&#8217;, &#8216;19910707&#8217;, &#8216;20210601&#8217;, 4, 98000, &#8216;Sales &amp; Marketing&#8217;, &#8216;SA&#8217;, &#8216;Head Of Sales&#8217;, 40, 1, NULL),<\/p>\n<p>(10, &#8216;Jo&#8217;, &#8216;Carver&#8217;, &#8216;19900810&#8217;, &#8216;20191201&#8217;, 4, 70000, &#8216;Sales &amp; Marketing&#8217;, &#8216;SA&#8217;, &#8216;Head Of Marketing&#8217;, 40, 1, NULL),<\/p>\n<p>&nbsp;<\/p>\n<p>(11, &#8216;John&#8217;, &#8216;O&#8221;Shea&#8217;, &#8216;19700609&#8217;, &#8216;20180601&#8217;, 5, 70000, &#8216;Technology&#8217;, &#8216;TE&#8217;, &#8216;Development Manager&#8217;, 40, 1, NULL),<\/p>\n<p>(12, &#8216;Eric&#8217;, &#8216;Bristow&#8217;, &#8216;20000109&#8217;, &#8216;20221001&#8217;, 5, 72000, &#8216;Technology&#8217;, &#8216;TE&#8217;, &#8216;Infrastructure Manager&#8217;, 40, 1, NULL),<\/p>\n<p>(13, &#8216;Ronald&#8217;, &#8216;Sanders&#8217;, &#8216;19601209&#8217;, &#8216;20190101&#8217;, 6, 45000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Shift Manager&#8217;, 45, 1, NULL),<\/p>\n<p>(14, &#8216;Amy&#8217;, &#8216;Fry&#8217;, &#8216;19921101&#8217;, &#8216;20190101&#8217;, 6, 45000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Shift Manager&#8217;, 45, 1, NULL),<\/p>\n<p>(15, &#8216;Greg&#8217;, &#8216;Andrews&#8217;, &#8216;19871212&#8217;, &#8216;20190101&#8217;, 6, 45000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Shift Manager&#8217;, 45, 1, NULL),<\/p>\n<p>(16, &#8216;Dave&#8217;, &#8216;Turney&#8217;, &#8216;19760609&#8217;, &#8216;20190101&#8217;, 6, 52000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Warehouse Manager&#8217;, 48, 1, NULL),<\/p>\n<p>(17, &#8216;Mark&#8217;, &#8216;Sokolowski&#8217;, &#8216;19960209&#8217;, &#8216;20190901&#8217;, 16, 42000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Goods Inn Manager&#8217;, 40, 1, NULL),<\/p>\n<p>&nbsp;<\/p>\n<p>(18, &#8216;Robin&#8217;, &#8216;Round&#8217;, &#8216;19940409&#8217;, &#8216;20190601&#8217;, 3, 60000, &#8216;Human Resources&#8217;, &#8216;HR&#8217;, &#8216;Recruitment Manager&#8217;, 40, 1, NULL),<\/p>\n<p>(19, &#8216;Lucy&#8217;, &#8216;Sykes&#8217;, &#8216;19890201&#8217;, &#8216;20200201&#8217;, 9, 65000, &#8216;Sales&#8217;, &#8216;SA&#8217;, &#8216;US Sales Manager&#8217;, 40, 1, NULL),<\/p>\n<p>(20, &#8216;Bruce&#8217;, &#8216;Bryant&#8217;, &#8216;19860304&#8217;, &#8216;20200301&#8217;, 9, 70000, &#8216;Sales&#8217;, &#8216;SA&#8217;, &#8216;International Sales Manager&#8217;, 40, 1, NULL),<\/p>\n<p>(21, &#8216;Ashwin&#8217;, &#8216;Kumar&#8217;, &#8216;20010212&#8217;, &#8216;20210601&#8217;, 20, 55000, &#8216;Sales&#8217;, &#8216;SA&#8217;, &#8216;Euro Sales Manager&#8217;, 40, 1, NULL),<\/p>\n<p>(22, &#8216;Emma&#8217;, &#8216;Roberts&#8217;, &#8216;20000208&#8217;, &#8216;20210601&#8217;, 20, 55000, &#8216;Sales&#8217;, &#8216;SA&#8217;, &#8216;APAC Sales Manager&#8217;, 40, 1, NULL) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u73b0\u5728\u5047\u8bbe\u6211\u4eec\u88ab\u8981\u6c42\u64b0\u5199\u4e00\u4efd\u62a5\u544a\uff0c\u5217\u51fa\u6240\u6709Sanjay Gupta\u7684\u76f4\u63a5\u4e0b\u5c5e\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u7b80\u5355\u67e5\u8be2\u6765\u5b9e\u73b0\uff1a<\/p>\n<blockquote><p>SELECT<\/p>\n<p>FirstName<\/p>\n<p>, LastName<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE ManagerID = 2 ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u4f46\u662f\uff0c\u5982\u679c\u6211\u4eec\u88ab\u8981\u6c42\u7f16\u5199\u4e00\u4e2a\u67e5\u8be2\uff0c\u8fd4\u56de Sanjay Gupta \u7684\u6240\u6709\u76f4\u63a5\u4e0b\u5c5e\u548c\u95f4\u63a5\u4e0b\u5c5e\u5462\uff1f\u8fd9\u5c31\u4f1a\u53d8\u5f97\u66f4\u590d\u6742\u3002\u521b\u5efa\u6b64\u62a5\u8868\u6709\u51e0\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u4ee4\u4eba\u754f\u60e7\u7684\u6e38\u6807\uff08\u6211\u4eec\u5c06\u5728\u7b2c 5 \u7ae0\u8ba8\u8bba\uff09\uff0c\u4f46\u6700\u4f73\u5b9e\u8df5\u65b9\u6cd5\u662f\u5f00\u53d1\u4eba\u5458\u4f7f\u7528\u9012\u5f52\u516c\u5171\u8868\u8868\u8fbe\u5f0f\uff08CTE\uff09\u3002CTE \u662f\u4e00\u4e2a\u4e34\u65f6\u7ed3\u679c\u96c6\uff0c\u53ef\u4ee5\u5728\u67e5\u8be2\u4e2d\u88ab\u591a\u6b21\u5f15\u7528\u3002\u5b83\u4e5f\u53ef\u4ee5\u5f15\u7528\u81ea\u8eab\uff0c\u4ece\u800c\u5b9e\u73b0\u9012\u5f52\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u9012\u5f52\u662f\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5b9e\u73b0\u5c42\u7ea7\u7ed3\u6784\u7684\u5173\u952e\u3002\u4f8b\u5982\uff0c\u5217\u8868 3.7 \u4e2d\u7684\u67e5\u8be2\u4f7f\u7528\u4e86\u4e00\u4e2a\u516c\u7528\u8868\u8868\u8fbe\u5f0f\uff08CTE\uff09\u6765\u8fd4\u56de\u6240\u6709\u76f4\u63a5\u548c\u95f4\u63a5\u5411 Sanjay Gupta \u62a5\u544a\u7684\u5458\u5de5\u8bb0\u5f55\uff0cSanjay Gupta \u7684 EmployeeID \u4e3a 2\u3002\u5728 CTE \u7684\u5b9a\u4e49\u4e2d\uff0c\u7b2c\u4e00\u4e2a\u67e5\u8be2\u8fd4\u56de Sanjay \u81ea\u5df1\u7684\u5458\u5de5\u8bb0\u5f55\u3002\u7136\u540e\uff0cUNION ALL \u5b50\u53e5\u5c06\u7b2c\u4e8c\u4e2a\u67e5\u8be2\u7684\u7ed3\u679c\u8ffd\u52a0\u4e0a\u53bb\u3002\u7b2c\u4e8c\u4e2a\u67e5\u8be2\u662f\u9012\u5f52\u7684\uff0c\u56e0\u4e3a\u5b83\u5c06 Employees \u8868\u7684\u7ed3\u679c\u4e0e CTE \u4e2d\u7b2c\u4e00\u4e2a\u67e5\u8be2\u7684\u7ed3\u679c\u8fdb\u884c\u8fde\u63a5\u3002\u7531\u4e8e\u8fde\u63a5\u662f\u5c06\u7b2c\u4e00\u4e2a\u7ed3\u679c\u96c6\u4e2d\u7684 EmployeeID \u4e0e\u7b2c\u4e8c\u4e2a\u7ed3\u679c\u96c6\u4e2d\u7684 ManagerID \u76f8\u8fde\uff0c\u56e0\u6b64\u7b2c\u4e8c\u4e2a\u7ed3\u679c\u96c6\u5305\u542b\u4e0b\u5c5e\u5458\u5de5\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u6700\u7ec8\u7684 SELECT \u8bed\u53e5\u4f4d\u4e8e CTE \u5916\u90e8\u3002\u5b83\u8fd4\u56de CTE \u4e2d\u7684\u6240\u6709\u8bb0\u5f55\uff0c\u7136\u540e\u518d\u6b21\u8fde\u63a5\u5230\u5e95\u5c42\u7684 Employees \u8868\uff0c\u4ee5\u586b\u5145\u7ba1\u7406\u8005\u7684\u540d\u5b57\u548c\u59d3\u6c0f\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @ManagerID INT ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @ManagerID = 2<\/p>\n<p>&nbsp;<\/p>\n<p>;WITH EmployeeCTE AS (<\/p>\n<p>SELECT<\/p>\n<p>EmployeeId<\/p>\n<p>, FirstName<\/p>\n<p>, LastName<\/p>\n<p>, ManagerId<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE EmployeeId = @ManagerID<\/p>\n<p>UNION ALL<\/p>\n<p>SELECT<\/p>\n<p>Emp.EmployeeId<\/p>\n<p>, Emp.FirstName<\/p>\n<p>, Emp.LastName<\/p>\n<p>, Emp.ManagerId<\/p>\n<p>FROM dbo.Employees AS Emp<\/p>\n<p>INNER JOIN EmployeeCTE AS CTE<\/p>\n<p>ON CTE.EmployeeId=Emp.ManagerId<\/p>\n<p>)<\/p>\n<p>SELECT<\/p>\n<p>Emp.EmployeeID<\/p>\n<p>, Emp.FirstName<\/p>\n<p>, Emp.LastName<\/p>\n<p>, Emp.ManagerID<\/p>\n<p>, Mgr.FirstName AS ManagerFirstName<\/p>\n<p>, Mgr.LastName AS ManagerLastName<\/p>\n<p>FROM EmployeeCTE Emp<\/p>\n<p>INNER JOIN dbo.Employees Mgr<\/p>\n<p>ON Emp.ManagerID = Mgr.EmployeeID ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u53e6\u4e00\u4e2a\u6211\u4eec\u53ef\u80fd\u4f1a\u88ab\u8981\u6c42\u7f16\u5199\u7684\u5178\u578b\u67e5\u8be2\u6d89\u53ca\u786e\u5b9a\u8c01\u7ba1\u7406\u5458\u5de5\u7684\u7ecf\u7406\u3002\u8fd9\u5728\u6784\u5efa\u5347\u7ea7\u8def\u5f84\u65f6\u5f88\u5e38\u89c1\u3002\u6e05\u5355 3.8 \u4e2d\u7684\u67e5\u8be2\u6f14\u793a\u4e86\u5982\u4f55\u786e\u5b9a Emma Roberts \u7684\u7ecf\u7406\u7684\u4e0a\u7ea7\u662f\u8c01\u3002\u5728\u6b64\u67e5\u8be2\u4e2d\uff0c\u6211\u4eec\u5728 CTE \u4e2d\u7684\u7b2c\u4e00\u4e2a\u67e5\u8be2\u4e2d\u6dfb\u52a0\u4e86\u4e00\u4e2a\u5e38\u91cf 0\uff0c\u5e76\u4e3a\u7ed3\u679c\u96c6\u6307\u5b9a\u4e86\u5217\u540d Level\uff0c\u5e76\u6307\u5b9a Emma Roberts \u5904\u4e8e\u7b49\u7ea7 0\u3002\u7136\u540e\u9012\u5f52\u67e5\u8be2\u4f1a\u4e3a\u5c42\u7ea7\u4e2d\u7684\u6bcf\u4e00\u5c42\u9012\u589e\u7b49\u7ea7\u6570\u3002\u6700\u540e\u7684\u67e5\u8be2\uff08\u5728 CTE \u4e4b\u5916\uff09\u6839\u636e\u7b49\u7ea7 2 \u8fdb\u884c\u7b5b\u9009\uff0c\u4ee5\u8fd4\u56de\u6bd4 Emma \u9ad8\u4e24\u7ea7\u7684\u5b9e\u4f53\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @EmployeeID INT ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @EmployeeID = 22<\/p>\n<p>&nbsp;<\/p>\n<p>; WITH EmployeeCTE AS<\/p>\n<p>(<\/p>\n<p>SELECT<\/p>\n<p>employeeid<\/p>\n<p>, firstname<\/p>\n<p>, lastname<\/p>\n<p>, managerid<\/p>\n<p>, Role<\/p>\n<p>, 0 as Level<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE EmployeeID = @EmployeeID<\/p>\n<p>UNION ALL<\/p>\n<p>SELECT<\/p>\n<p>emp.EmployeeID<\/p>\n<p>, emp.FirstName<\/p>\n<p>, emp.LastName<\/p>\n<p>, emp.ManagerID<\/p>\n<p>, emp.Role<\/p>\n<p>, Level + 1<\/p>\n<p>FROM dbo.employees emp<\/p>\n<p>INNER JOIN EmployeeCTE cte<\/p>\n<p>ON emp.EmployeeID = cte.ManagerID<\/p>\n<p>)<\/p>\n<p>&nbsp;<\/p>\n<p>SELECT<\/p>\n<p>firstname<\/p>\n<p>, lastname<\/p>\n<p>, Role<\/p>\n<p>FROM EmployeeCTE<\/p>\n<p>WHERE Level = 2 ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u8fd9\u79cd\u4f20\u7edf\u5b9e\u73b0\u5c42\u7ea7\u7ed3\u6784\u7684\u65b9\u6cd5\u7684\u6311\u6218\u5728\u4e8e\uff0c\u5b83\u8981\u6c42\u5f00\u53d1\u8005\u7f16\u5199\u5927\u91cf\u4ee3\u7801\u3002\u672c\u8282\u4e2d\u7684\u793a\u4f8b\u6bd4\u8f83\u7b80\u5355\uff0c\u4ec5\u7528\u4e8e\u8bf4\u660e\u76ee\u7684\uff0c\u4f46\u5728\u5b9e\u9645\u573a\u666f\u4e2d\uff0c\u9012\u5f52CTE\u53ef\u80fd\u4f1a\u53d8\u5f97\u590d\u6742\u4e14\u96be\u4ee5\u7ba1\u7406\u3002\u6bcf\u5f53\u4e1a\u52a1\u63d0\u51fa\u7a0d\u6709\u4e0d\u540c\u7684\u8bf7\u6c42\u65f6\uff0c\u5f00\u53d1\u8005\u90fd\u9700\u8981\u7f16\u5199\u4ee3\u7801\u4ee5\u4ee5\u9002\u5f53\u7684\u65b9\u5f0f\u904d\u5386\u5c42\u7ea7\u7ed3\u6784\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u4f1a\u88ab\u8981\u6c42\u8fd4\u56de\u7ec4\u7ec7\u7ed3\u6784\u4e2d\u7b2c\u4e09\u7ea7\u6240\u6709\u7ba1\u7406\u8005\u7684\u5217\u8868\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8bb8\u591a\u5f00\u53d1\u8005\u6ca1\u6709\u610f\u8bc6\u5230\u7684\u662f\uff0c\u5fae\u8f6f\u5df2\u7ecf\u4e3a\u6211\u4eec\u5b8c\u6210\u4e86\u5927\u90e8\u5206\u7684\u8270\u96be\u5de5\u4f5c\uff0c\u5373\u5b9e\u73b0\u4e86 HIERARCHYID \u6570\u636e\u7c7b\u578b\u3002\u8fd9\u662f\u4e00\u79cd\u7528 .NET \u7f16\u5199\u7684\u9ad8\u7ea7\u6570\u636e\u7c7b\u578b\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u5bf9\u5176\u8c03\u7528\u65b9\u6cd5\uff0c\u4ece\u800c\u5728\u4e0d\u9700\u8981\u7f16\u5199\u590d\u6742\u7684 CTE \u7684\u60c5\u51b5\u4e0b\u904d\u5386\u5c42\u6b21\u7ed3\u6784\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e3a\u4e86\u4e86\u89e3\u8fd9\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u8ba9\u6211\u4eec\u5728 Employees \u8868\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u5217\uff0c\u540d\u4e3a ManagerHierarchyID\uff0c\u5176\u7c7b\u578b\u5c06\u4e3a HIERARCHYID\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6e05\u5355\u4e2d\u7684\u811a\u672c\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>ALTER TABLE dbo.Employees ADD<\/p>\n<p>ManagerHierarchyID HIERARCHYID NULL ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u4e3a\u4e86\u5229\u7528 SQL Server \u7684\u5c42\u7ea7\u529f\u80fd\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u5bf9\u5c42\u7ea7\u8fdb\u884c\u5efa\u6a21\u3002\u4e3a\u4e86\u8bf4\u660e\u8fd9\u79cd\u5efa\u6a21\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u8bf7\u8003\u8651\u6211\u4eec\u7ec4\u7ec7\u7ed3\u6784\u56fe\u7684\u4ee5\u4e0b\u90e8\u5206\u3002Simon Gomez \u4f4d\u4e8e\u5c42\u7ea7\u7684\u9876\u7aef\uff0c\u6211\u4eec\u5c06\u5176\u79f0\u4e3a\u6839\u8282\u70b9\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5c42\u7ea7\u4f7f\u7528\u659c\u7ebf\u683c\u5f0f\u5efa\u6a21\u3002\u56e0\u6b64\uff0c\u5c42\u7ea7\u7684\u6839\u8868\u793a\u4e3a \/\u3002Sanjay Gupta \u548c Ed Ling \u4f4d\u4e8e\u5c42\u7ea7\u7684\u7b2c\u4e8c\u5c42\uff0c\u6bcf\u4e2a\u4eba\u90fd\u9700\u8981\u88ab\u552f\u4e00\u6807\u8bc6\u3002\u56e0\u6b64\uff0cSanjay \u5c06\u8868\u793a\u4e3a \/1\/\uff0cEd \u5c06\u8868\u793a\u4e3a \/2\/\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>Jamie Briggs \u548c Robin Round \u90fd\u5411 Ed Ling \u6c47\u62a5\u3002\u56e0\u6b64\uff0c\u4ed6\u4eec\u90fd\u5904\u4e8e\u5c42\u7ea7\u7684\u7b2c\u4e09\u7ea7\uff0c\u4f46\u4e5f\u9700\u8981\u88ab\u552f\u4e00\u8bc6\u522b\u3002\u56e0\u6b64\uff0c\u4ed6\u4eec\u5206\u522b\u8868\u793a\u4e3a \/1\/2\/1\/ \u548c \/1\/2\/2\/\u3002\u5c42\u7ea7\u4ece\u6b64\u7ee7\u7eed\u6784\u5efa\u3002\u7136\u540e\uff0c\u5b83\u4eec\u4ee5\u4f4d\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u5b58\u50a8\u5728\u8868\u4e2d\uff0c\u5e76\u4ee5\u5341\u516d\u8fdb\u5236\u503c\u672a\u7ecf\u683c\u5f0f\u5316\u7684\u65b9\u5f0f\u663e\u793a\u3002\u4f8b\u5982\uff0c\u4f4d\u4e8e\u6839\u7ea7\u522b\u7684 Simon Gomez \u7684\u5c42\u7ea7 ID \u5b58\u50a8\u4e3a 0x\uff0c\u800c\u4f4d\u4e8e\u7b2c\u4e8c\u7ea7\u7684 Sanjay Gupta \u5b58\u50a8\u4e3a 0x58\uff0cEd Ling \u4e5f\u5728\u7b2c\u4e8c\u7ea7\uff0c\u5b58\u50a8\u4e3a 0x68\u3002Jamie Briggs \u548c Robin Round \u5206\u522b\u5b58\u50a8\u4e3a 0x6AC0 \u548c 0x6B40\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f46\u4e0d\u8981\u5bb3\u6015\uff1a\u6ca1\u6709\u5fc5\u8981\u624b\u52a8\u5efa\u6a21\u5c42\u7ea7\u7ed3\u6784\u3002\u76f8\u53cd\uff0c\u6211\u4eec\u5c06\u91c7\u53d6\u4e24\u6b65\u6cd5\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u8f7b\u5efa\u6a21\u8fc7\u7a0b\u4e2d\u7684\u7e41\u91cd\u5de5\u4f5c\u3002\u7b2c\u4e00\u6b65\u662f\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u8868\uff0c\u8be5\u8868\u5305\u542b\u4e09\u5217\uff1aEmployeeID\u3001ManagerID\uff0c\u4ee5\u53ca\u4e00\u4e2a\u884c\u53f7\uff0c\u6211\u4eec\u5c06\u4f7f\u7528 ROW_NUMBER() \u51fd\u6570\u751f\u6210\u8be5\u884c\u53f7\uff0c\u5e76\u6309 ManagerID \u5bf9\u884c\u53f7\u8fdb\u884c\u5206\u533a\u3002\u8be5\u51fd\u6570\u5c06\u4e3a\u6211\u4eec\u63d0\u4f9b\u5728\u5c42\u7ea7\u5206\u652f\u7684\u6bcf\u4e2a\u7ea7\u522b\u6240\u9700\u7684\u9012\u589e\u6570\u5b57\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7b2c\u4e8c\u6b65\u662f\u5b9a\u4e49\u4e00\u4e2a\u57fa\u4e8e\u6211\u4eec\u7684\u4e34\u65f6\u8868\u7684\u516c\u7528\u8868\u8fbe\u5f0f\uff08CTE\uff09\uff0c\u5b83\u5c06\u901a\u8fc7\u5bf9 HIERARCHYID \u7c7b\u578b\u4f7f\u7528 GetRoot() \u5168\u5c40\u65b9\u6cd5\u6765\u5b9a\u4e49\u5c42\u7ea7\u7684\u6839\u8282\u70b9\uff0c\u9488\u5bf9\u4f4d\u4e8e\u5c42\u7ea7\u9876\u7aef\u3001\u56e0\u6b64 ManagerID \u4e3a NULL \u7684 Simon Gomez\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u9012\u5f52\u67e5\u8be2\u5c06\u901a\u8fc7\u5c06\u4e0b\u4e00\u4e2a\u5c42\u7ea7\u4e0e\u6211\u4eec\u4f7f\u7528 ROW_NUMBER() \u751f\u6210\u7684\u589e\u91cf\u503c\u8fde\u63a5\u6765\u6784\u5efa\u5c42\u6b21\u7ed3\u6784\u7684\u540e\u7eed\u7ea7\u522b\u3002\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 UPDATE \u8bed\u53e5\u4ece CTE \u83b7\u53d6\u751f\u6210\u7684\u5c42\u6b21\u7ed3\u6784 ID\uff0c\u5e76\u6839\u636e EmployeeID \u5bf9 Employees \u8868\u8fdb\u884c\u66f4\u65b0\u3002\u8fd9\u5728\u4e0b\u9762\u7684\u793a\u4f8b\u4e2d\u6709\u6f14\u793a\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>SELECT<\/p>\n<p>EmployeeID<\/p>\n<p>, ManagerID<\/p>\n<p>, ROW_NUMBER() OVER (PARTITION BY ManagerID ORDER BY ManagerID) AS Incremental<\/p>\n<p>INTO #Hierachy<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>&nbsp;<\/p>\n<p>;WITH HierarchyPathCTE AS (<\/p>\n<p>SELECT<\/p>\n<p>hierarchyid::GetRoot() AS ManagerHierarchyID<\/p>\n<p>, EmployeeID<\/p>\n<p>FROM #Hierachy AS C<\/p>\n<p>WHERE ManagerID IS NULL<\/p>\n<p>UNION ALL<\/p>\n<p>SELECT<\/p>\n<p>CAST(hpc.ManagerHierarchyID.ToString() + CAST(h.Incremental AS VARCHAR(30)) + &#8216;\/&#8217; AS HIERARCHYID)<\/p>\n<p>,h.EmployeeID<\/p>\n<p>FROM #Hierachy AS h<\/p>\n<p>JOIN HierarchyPathCTE AS hpc<\/p>\n<p>ON h.ManagerID = hpc.EmployeeID<\/p>\n<p>)<\/p>\n<p>&nbsp;<\/p>\n<p>UPDATE e<\/p>\n<p>SET ManagerHierarchyID = hp.ManagerHierarchyID<\/p>\n<p>FROM dbo.Employees e<\/p>\n<p>INNER JOIN HierarchyPathCTE hp<\/p>\n<p>ON e.EmployeeID = hp.EmployeeID ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u4ece\u8fd9\u4e00\u70b9\u5f00\u59cb\uff0c\u5904\u7406\u5c42\u7ea7\u53d8\u5f97\u975e\u5e38\u7b80\u5355\u3002\u56de\u60f3\u4e00\u4e0b\u6211\u4eec\u4e4b\u524d\u7f16\u5199\u7684\u67e5\u8be2\uff0c\u7528\u4e8e\u751f\u6210\u6240\u6709\u76f4\u63a5\u6216\u95f4\u63a5\u5411 Sanjay Gupta \u6c47\u62a5\u7684\u4eba\u7684\u5217\u8868\u3002\u6211\u4eec\u53ef\u4ee5\u7528\u4e0b\u9762\u6e05\u5355\u4e2d\u7684\u7b80\u5355\u67e5\u8be2\u66ff\u6362\u6574\u4e2a\u9012\u5f52\u67e5\u8be2\uff0c\u8fd9\u4e2a\u67e5\u8be2\u4f7f\u7528 IsDescendantOf() \u65b9\u6cd5\uff0c\u901a\u8fc7\u8bc6\u522b\u4f4d\u4e8e Sanjay Gupta \u6240\u5728\u5c42\u7ea7\u5206\u652f\u4e2d\u7684\u4efb\u4f55\u4eba\u6765\u8fc7\u6ee4\u67e5\u8be2\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @Manager HIERARCHYID ;<\/p>\n<p>&nbsp;<\/p>\n<p>SELECT @Manager = ManagerHierarchyID<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE EmployeeID = 2 ;<\/p>\n<p>&nbsp;<\/p>\n<p>SELECT<\/p>\n<p>EmployeeID<\/p>\n<p>, FirstName<\/p>\n<p>, LastName<\/p>\n<p>, ManagerHierarchyID.ToString()<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE ManagerHierarchyID.IsDescendantOf(@Manager) = 1 ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u4ee5\u7c7b\u4f3c\u7684\u65b9\u5f0f\uff0c\u56de\u60f3\u4e00\u4e0b\u6211\u4eec\u5199\u7684\u9012\u5f52\u67e5\u8be2\uff0c\u7528\u6765\u67e5\u627e\u8c01\u7ba1\u7406Emma Robert\u7684\u7ecf\u7406\u3002\u8fd9\u53ef\u4ee5\u7528\u4e0b\u9762\u6e05\u5355\u4e2d\u7684\u7b80\u5355\u811a\u672c\u6765\u66ff\u4ee3\uff0c\u8be5\u811a\u672c\u4f7f\u7528GetAncestor()\u65b9\u6cd5\u6765\u904d\u5386\u5c42\u7ea7\u7ed3\u6784\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @EmployeeID INT ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @EmployeeID = 22 ;<\/p>\n<p>&nbsp;<\/p>\n<p>SELECT<\/p>\n<p>FirstName<\/p>\n<p>, LastName<\/p>\n<p>, Role<\/p>\n<p>, ManagerhierarchyID.ToString() AS ManagerHierarchyID<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE ManagerHierarchyID = (<\/p>\n<p>SELECT ManagerHierarchyID.GetAncestor(2)<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE EmployeeID = @EmployeeID<\/p>\n<p>) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u4f60\u53ef\u80fd\u8fd8\u8bb0\u5f97\uff0c\u6211\u66fe\u63d0\u5230\u6211\u4eec\u53ef\u80fd\u4f1a\u88ab\u8981\u6c42\u4ee5\u591a\u79cd\u65b9\u5f0f\u904d\u5386\u5c42\u7ea7\u7ed3\u6784\uff0c\u5e76\u6697\u793a\u6211\u4eec\u53ef\u80fd\u4f1a\u9047\u5230\u9700\u8981\u67e5\u627e\u540c\u5c42\u7ea7\u540c\u884c\u7684\u60c5\u51b5\u3002\u4e3a\u4e86\u63a2\u8ba8\u8fd9\u6709\u591a\u7b80\u5355\uff0c\u60f3\u8c61\u4e00\u4e0b MagicChoc \u6b63\u5728\u8fdb\u884c\u85aa\u8d44\u57fa\u51c6\u8c03\u67e5\u3002\u5177\u4f53\u6765\u8bf4\uff0cAmy Fry \u5df2\u7ecf\u7533\u8bf7\u52a0\u85aa\uff0c\u4eba\u529b\u8d44\u6e90\u56e2\u961f\u60f3\u77e5\u9053\u5979\u7684\u85aa\u8d44\u662f\u5426\u4e0e\u7ec4\u7ec7\u4e2d\u540c\u7ea7\u522b\u7684\u5176\u4ed6\u4eba\u76f8\u5f53\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 GetLevel() \u65b9\u6cd5\u6765\u786e\u5b9a\u5979\u6240\u5728\u7684\u5c42\u7ea7\uff0c\u7136\u540e\u8fd4\u56de\u540c\u4e00\u5c42\u7ea7\u4e0a\u6240\u6709\u5176\u4ed6\u5458\u5de5\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u8fd9\u4e2a\u6280\u5de7\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\u6f14\u793a\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @EmployeeID INT ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @EmployeeID = 14 ;<\/p>\n<p>&nbsp;<\/p>\n<p>SELECT<\/p>\n<p>FirstName<\/p>\n<p>, LastName<\/p>\n<p>, Salary<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE ManagerHierarchyID.GetLevel() = (<\/p>\n<p>SELECT<\/p>\n<p>ManagerHierarchyID.GetLevel()<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE EmployeeID = @EmployeeID<\/p>\n<p>) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p><strong>\u9519\u8bef9# \u4e0d\u5c06 XML \u6570\u636e\u5b58\u50a8\u4e3a\u539f\u751f XML<\/strong><\/p>\n<p>\u5f53 XML \u6570\u636e\u4f20\u9012\u5230\u6570\u636e\u5e93\u65f6\uff0c\u5f00\u53d1\u8005\u5e38\u5e38\u89c9\u5f97\u6709\u5fc5\u8981\u5c06\u8fd9\u4e9b\u6570\u636e\u5b58\u50a8\u5728\u5173\u7cfb\u578b\u6570\u636e\u7ed3\u6784\u4e2d\u3002\u8fd9\u6709\u65f6\u51fa\u4e8e\u5bf9\u6700\u4f73\u5b9e\u8df5\u7684\u7406\u89e3\u2014\u2014\u65e2\u7136\u8fd9\u662f\u6570\u636e\u5e93\uff0c\u90a3\u4e48\u4ee5\u5173\u7cfb\u578b\u683c\u5f0f\u5b58\u50a8\u6570\u636e\u80af\u5b9a\u66f4\u597d\uff1f\u6709\u65f6\u5219\u662f\u56e0\u4e3a\u5bb3\u6015 XML\uff0c\u4ee5\u53ca\u62c5\u5fc3\u9700\u8981\u7f16\u5199\u590d\u6742\u7684 XQuery \u8bed\u53e5\u6765\u8bbf\u95ee\u6570\u636e\u3002\u5766\u7387\u5730\u8bf4\uff0c\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u5c06\u6570\u636e\u5b58\u50a8\u4e3a\u5173\u7cfb\u578b\u683c\u5f0f\u786e\u5b9e\u662f\u4e2a\u597d\u4e3b\u610f\uff0c\u4f46\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\u60c5\u51b5\u5e76\u975e\u5982\u6b64\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8ba9\u6211\u4eec\u56de\u5fc6\u4e00\u4e0b\u6211\u4eec\u7684\u5458\u5de5\u8868\u3002\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u53ea\u4e3a\u7ba1\u7406\u56e2\u961f\u6dfb\u52a0\u4e86\u5458\u5de5\u8bb0\u5f55\uff0c\u4ed6\u4eec\u90fd\u662f\u6b63\u5f0f\u5458\u5de5\u3002\u7136\u800c\uff0c\u4ed3\u5e93\u7ecf\u5e38\u901a\u8fc7\u4e00\u5bb6\u540d\u4e3a Total Warehouse Jobs \u7684\u62db\u8058\u673a\u6784\u96c7\u7528\u4e34\u65f6\u5458\u5de5\u3002MagicChoc \u4e0e\u8fd9\u5bb6\u673a\u6784\u6709\u5927\u91cf\u4e1a\u52a1\u5f80\u6765\uff0c\u56e0\u6b64\u4e24\u5bb6\u516c\u53f8\u51b3\u5b9a\u6574\u5408\u4ed6\u4eec\u7684\u7cfb\u7edf\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5f53\u4e34\u65f6\u5de5\u79bb\u5f00MagicChoc\u65f6\uff0c\u4ed6\u4eec\u7684\u5458\u5de5\u8bb0\u5f55\u4f1a\u4ece\u7cfb\u7edf\u4e2d\u5220\u9664\u3002\u7136\u800c\uff0cTotal Warehouse Jobs\u4f1a\u4fdd\u7559\u4ed6\u4eec\u8fc7\u53bb\u5408\u540c\u7684\u8bb0\u5f55\u3002\u5982\u679c\u67d0\u4eba\u548cMagicChoc\u7b7e\u8ba2\u65b0\u5408\u540c\uff0c\u90a3\u4e48Total Warehouse Jobs\u9700\u8981\u63d0\u4f9b\u4ed6\u4eec\u4ee5\u5f80\u5408\u540c\u7684\u6e05\u5355\uff0c\u4ee5\u53ca\u4ed6\u4eec\u6240\u62c5\u4efb\u7684\u804c\u4f4d\u3002\u8fd9\u6709\u52a9\u4e8eMagicChoc\u4e3a\u4ed6\u4eec\u5206\u914d\u9002\u5408\u5176\u7ecf\u9a8c\u7684\u5de5\u4f5c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>XML \u7684\u7279\u6027\u610f\u5473\u7740\u5b83\u5177\u6709\u53ef\u6269\u5c55\u6027\u548c\u53ef\u8bfb\u6027\uff0c\u652f\u6301\u6a21\u5f0f\u9a8c\u8bc1\uff0c\u5e76\u4e14\u53ef\u4ee5\u88ab\u666e\u904d\u5904\u7406\u3002\u8fd9\u4f7f\u5b83\u6210\u4e3a\u7cfb\u7edf\u96c6\u6210\u7684\u70ed\u95e8\u9009\u62e9\u3002\u5728\u6211\u4eec\u7684\u573a\u666f\u4e2d\uff0c\u5df2\u8fbe\u6210\u4e00\u81f4\uff0c\u4e00\u65e6\u5408\u540c\u7b7e\u7f72\uff0cTotal Warehouse Jobs \u5c06\u4ee5 XML \u6587\u6863\u7684\u5f62\u5f0f\u53d1\u9001\u5458\u5de5\u4e4b\u524d\u5408\u540c\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u8fd9\u4e9b\u4fe1\u606f\u9700\u8981\u5b58\u50a8\u5728\u4eba\u529b\u8d44\u6e90\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4ed3\u5e93\u5e94\u7528\u7a0b\u5e8f\u6bcf\u5929\u4f7f\u7528\u8fd9\u4e9b\u6570\u636e\u6765\u8ba1\u7b97\u6839\u636e\u6bcf\u65e5\u751f\u4ea7\u4f18\u5148\u7ea7\u5c06\u54ea\u4e9b\u4eba\u5206\u914d\u5230\u54ea\u4e9b\u4efb\u52a1\u3002ETL \u8fc7\u7a0b\u9700\u8981\u4ee5 XML \u683c\u5f0f\u5c06\u6570\u636e\u53d1\u9001\u5230\u4ed3\u5e93\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u62c6\u89e3 XML<\/strong><\/p>\n<p>\u6211\u770b\u5230\u4e00\u4e9b\u5f00\u53d1\u4eba\u5458\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\u7684\u65b9\u5f0f\u662f\u5c06\u63a5\u6536\u5230\u7684 XML \u6570\u636e\u62c6\u5206\u5230\u5173\u7cfb\u8868\u4e2d\uff0c\u7136\u540e\u91cd\u65b0\u6784\u5efa\u4e00\u4e2a XML \u6587\u6863\u53d1\u9001\u7ed9\u63a5\u6536\u65b9\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5982\u679c\u6211\u4eec\u5728 MagicChoc \u793a\u4f8b\u4e2d\u91c7\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u9996\u5148\u9700\u8981\u505a\u7684\u662f\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u5b58\u653e\u5386\u53f2\u5408\u540c\u6570\u636e\u7684\u6a21\u5f0f\u3002\u7531\u4e8e\u6570\u636e\u7684\u6027\u8d28\uff0c\u6211\u4eec\u5c06\u9700\u8981\u4e09\u4e2a\u8868\u6765\u907f\u514d\u6570\u636e\u91cd\u590d\u3002\u8fd9\u662f\u89c4\u8303\u5316\u7684\u4e00\u4e2a\u5173\u952e\u6982\u5ff5\uff0c\u6211\u4eec\u5c06\u5728\u7b2c\u56db\u7ae0\u8ba8\u8bba\u3002\u4e0b\u9762\u7684\u793a\u4f8b\u5c55\u793a\u4e86\u8be5\u8868\u53ef\u80fd\u7684\u6837\u5b50\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>CREATE TABLE dbo.ContractHistory (<\/p>\n<p>ContractHistoryID \u00a0 \u00a0SMALLINT \u00a0 \u00a0NOT NULL \u00a0 \u00a0PRIMARY KEY \u00a0 \u00a0IDENTITY,<\/p>\n<p>EmployeeID \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 SMALLINT \u00a0 \u00a0NOT NULL \u00a0 \u00a0REFERENCES dbo.Employees(EmployeeID),<\/p>\n<p>ContractStartDate \u00a0 \u00a0DATE \u00a0 \u00a0 \u00a0 \u00a0NOT NULL,<\/p>\n<p>ContractEndDate \u00a0 \u00a0 \u00a0DATE \u00a0 \u00a0 \u00a0 \u00a0NOT NULL<\/p>\n<p>) ;<\/p>\n<p>&nbsp;<\/p>\n<p>CREATE TABLE dbo.Skills (<\/p>\n<p>SkillsID \u00a0 \u00a0SMALLINT \u00a0 \u00a0NOT NULL \u00a0 \u00a0PRIMARY KEY \u00a0 \u00a0IDENTITY,<\/p>\n<p>Skill \u00a0 \u00a0 \u00a0 VARCHAR(30) NOT NULL<\/p>\n<p>) ;<\/p>\n<p>&nbsp;<\/p>\n<p>CREATE TABLE dbo.ContractSkills (<\/p>\n<p>ContractSkillsID \u00a0 \u00a0INT \u00a0 \u00a0 \u00a0 \u00a0 NOT NULL \u00a0 \u00a0PRIMARY KEY \u00a0 \u00a0IDENTITY,<\/p>\n<p>ContractHistoryID \u00a0 SMALLINT \u00a0 \u00a0NOT NULL \u00a0 \u00a0REFERENCES dbo.ContractHistory(ContractHistoryID),<\/p>\n<p>SkillID \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 SMALLINT \u00a0 \u00a0NOT NULL \u00a0 \u00a0REFERENCES dbo.Skills(SkillsID)<\/p>\n<p>) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u56e0\u4e3a\u6211\u4eec\u521a\u521b\u5efa\u7684\u6280\u80fd\u8868\u662f\u4e00\u4e2a\u53c2\u8003\u8868\uff0c\u5728\u7ee7\u7eed\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u4f7f\u7528\u4ee5\u4e0b\u6e05\u5355\u4e2d\u7684\u811a\u672c\u6dfb\u52a0\u4e00\u4e9b\u793a\u4f8b\u6570\u636e\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>INSERT INTO dbo.Skills (Skill)<\/p>\n<p>VALUES<\/p>\n<p>(&#8216;Picker&#8217;),<\/p>\n<p>(&#8216;Packer&#8217;),<\/p>\n<p>(&#8216;Stock Take&#8217;),<\/p>\n<p>(&#8216;Forklift Driver&#8217;),<\/p>\n<p>(&#8216;Machine 1 operator&#8217;),<\/p>\n<p>(&#8216;Machine 2 operator&#8217;),<\/p>\n<p>(&#8216;Machine 3 operator&#8217;),<\/p>\n<p>(&#8216;Machine 4 operator&#8217;) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u5386\u53f2\u5408\u540c\u6570\u636e\u7531\u4e00\u4e2a\u4ee5\u5143\u7d20\u4e3a\u4e2d\u5fc3\u7684 XML \u6587\u6863\u7ec4\u6210\uff0c\u6839\u5143\u7d20\u79f0\u4e3a &lt;EmployeeContracts&gt;\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u6839\u5143\u7d20\u4e0b\u9762\uff0c\u6709\u4e00\u4e2a\u540d\u4e3a&lt; Employee &gt;\u7684\u590d\u6742\u5143\u7d20\uff0c\u5176\u4e2d\u5305\u542b\u5c06\u5728\u6211\u4eec\u7684Employees\u8868\u4e2d\u5b58\u50a8\u7684\u5b50\u5143\u7d20\u3002\u5b83\u8fd8\u5305\u542b\u4e00\u4e2a\u540d\u4e3a&lt; Contracts &gt;\u7684\u5d4c\u5957\u590d\u6742\u5143\u7d20\uff0c\u8be5\u5143\u7d20\u5305\u542b\u4e00\u4e2a\u91cd\u590d\u5143\u7d20&lt; Contract &gt;\uff0c\u5176\u4e2d\u5305\u542b\u6bcf\u4e2a\u5458\u5de5\u6240\u62e5\u6709\u7684\u6bcf\u4efd\u5408\u540c\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u5728&lt; Contract &gt;\u4e0b\u8fd8\u5d4c\u5957\u4e86\u4e00\u4e2a\u66f4\u590d\u6742\u7684\u5143\u7d20\uff0c\u79f0\u4e3a&lt; Skills &gt;\uff0c\u5176\u4e2d\u53c8\u5305\u542b\u4e00\u4e2a\u91cd\u590d\u5143\u7d20&lt; Skill &gt;\u3002\u6211\u4eec\u4eceTotal Warehouse Jobs\u6536\u5230\u7684\u6570\u636e\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>&lt;EmployeeContracts&gt;<\/p>\n<p>&lt;Employee&gt;<\/p>\n<p>&lt;EmployeeID&gt;23&lt;\/EmployeeID&gt;<\/p>\n<p>&lt;FirstName&gt;Robert&lt;\/FirstName&gt;<\/p>\n<p>&lt;LastName&gt;Blake&lt;\/LastName&gt;<\/p>\n<p>&lt;DateOfBirth&gt;19781212&lt;\/DateOfBirth&gt;<\/p>\n<p>&lt;Contracts&gt;<\/p>\n<p>&lt;Contract&gt;<\/p>\n<p>&lt;StartDate&gt;20200101&lt;\/StartDate&gt;<\/p>\n<p>&lt;EndDate&gt;20203006&lt;\/EndDate&gt;<\/p>\n<p>&lt;Skills&gt;<\/p>\n<p>&lt;Skill&gt;Forklift driver&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Picker&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Packer&lt;\/Skill&gt;<\/p>\n<p>&lt;\/Skills&gt;<\/p>\n<p>&lt;\/Contract&gt;<\/p>\n<p>&lt;Contract&gt;<\/p>\n<p>&lt;StartDate&gt;20210101&lt;\/StartDate&gt;<\/p>\n<p>&lt;EndDate&gt;20211212&lt;\/EndDate&gt;<\/p>\n<p>&lt;Skills&gt;<\/p>\n<p>&lt;Skill&gt;Picker&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Stock Take&lt;\/Skill&gt;<\/p>\n<p>&lt;\/Skills&gt;<\/p>\n<p>&lt;\/Contract&gt;<\/p>\n<p>&lt;\/Contracts&gt;<\/p>\n<p>&lt;\/Employee&gt;<\/p>\n<p>&lt;\/EmployeeContracts&gt;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u56e0\u6b64\uff0c\u8981\u4f7f\u7528\u5c06\u6b64\u6570\u636e\u96c6\u5b58\u50a8\u5728\u4f20\u7edf\u5173\u7cfb\u7ed3\u6784\u4e2d\u7684\u65b9\u6cd5\uff0c\u6211\u4eec\u7684\u7b2c\u4e00\u6b65\u662f\u62c6\u5206\u63a5\u6536\u5230\u7684\u6570\u636e\u3002\u4e3a\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 OPENXML() \u51fd\u6570\uff0c\u8be5\u51fd\u6570\u4f1a\u4ece XML \u6587\u6863\u8fd4\u56de\u4e00\u4e2a\u884c\u96c6\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 nodes() \u548c value() XQuery \u65b9\u6cd5\u7684\u7ec4\u5408\u3002\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528 OPENXML()\uff0c\u56e0\u4e3a\u8fd9\u662f\u6211\u6700\u5e38\u770b\u5230\u4eba\u4eec\u4f7f\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f7f\u7528 OPENXML() \u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u590d\u6742\u6027\u5728\u4e8e\u5b83\u6ca1\u6709\u5185\u7f6e\u7684 XML \u89e3\u6790\u5668\u3002\u76f8\u53cd\uff0c\u6211\u4eec\u5fc5\u987b\u5728\u5c06 XML \u6587\u6863\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u4e4b\u524d\uff0c\u4f7f\u7528 MSXML \u89e3\u6790\u5668\u89e3\u6790\u5b83\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 sp_xml_preparedocument \u5b58\u50a8\u8fc7\u7a0b\u6765\u6267\u884c\u6587\u6863\u51c6\u5907\u3002\u8be5\u8fc7\u7a0b\u5c06\u89e3\u6790\u6587\u6863\uff0c\u8f93\u51fa\u5bf9\u8c61\u5c06\u5305\u542b\u6307\u5411\u6587\u6863\u4e2d\u8282\u70b9\u7684\u5185\u5b58\u6811\u8868\u793a\u7684\u53e5\u67c4\uff0c\u7136\u540e\u53ef\u4ee5\u5c06\u5176\u4f20\u9012\u7ed9\u51fd\u6570\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6211\u4eec\u8fd8\u9700\u8981\u4f20\u9012 OPENXML() \u51fd\u6570\uff0c\u4e00\u4e2a\u7528\u4e8e\u6807\u8bc6\u8981\u5904\u7406\u884c\u7684 XPath \u6a21\u5f0f\u3002\u6211\u4eec\u5c06\u628a\u8fd9\u4e2a XPath \u8868\u8fbe\u5f0f\u6307\u5411\u5c42\u6b21\u7ed3\u6784\u7684\u6700\u4f4e\u7ea7\u522b\uff0c\u7136\u540e\u5728\u6620\u5c04\u4e2d\u4f7f\u7528 ..\/ \u8fd0\u7b97\u7b26\u6765\u904d\u5386\u66f4\u9ad8\u7ea7\u522b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u662f\u53ef\u9009\u7684\uff0c\u7528\u4e8e\u6307\u793a\u5982\u4f55\u586b\u5145\u6ea2\u51fa\u5217\u3002\u53ef\u80fd\u7684\u503c\u5728\u8868 3.2 \u4e2d\u6709\u8be6\u7ec6\u8bf4\u660e\u3002<\/p>\n<p>&nbsp;<\/p>\n<table width=\"100%\">\n<thead>\n<tr>\n<td>Value<\/td>\n<td>Description<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>0<\/td>\n<td>Attribute-centric mapping<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>Applies attribute-centric mapping followed by element-centric mapping<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Applies element-centric mapping followed by attribute-centric mapping<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>Does not copy data to the overflow property<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>WITH \u5b50\u53e5\u4e0e OPENXML() \u4e00\u8d77\u4f7f\u7528\uff0c\u7528\u4e8e\u6307\u5b9a\u6587\u6863\u4e2d\u8282\u70b9\u7684\u6570\u636e\u7c7b\u578b\u548c\u6620\u5c04\u3002\u5982\u679c\u7701\u7565 WITH \u5b50\u53e5\uff0c\u5219 SQL Server \u4f1a\u8fd4\u56de\u4e00\u4e2a XML \u8fb9\u8868\uff0c\u8be6\u7ec6\u5217\u51fa\u6587\u6863\u7684\u7ec6\u7c92\u5ea6\u7ed3\u6784\u4fe1\u606f\uff0c\u5305\u62ec\u547d\u540d\u7a7a\u95f4 URI\u3001\u547d\u540d\u7a7a\u95f4\u524d\u7f00\uff0c\u4ee5\u53ca\u6307\u5411\u4e0b\u4e00\u4e2a\u548c\u4e0a\u4e00\u4e2a\u5144\u5f1f\u5143\u7d20\u7684\u6307\u9488\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6e05\u5355 3.16 \u4e2d\u7684\u811a\u672c\u6f14\u793a\u4e86\u5c06\u6570\u636e\u62c6\u89e3\u5e76\u63d2\u5165\u5230\u8868\u4e2d\u7684\u8fc7\u7a0b\u53ef\u80fd\u662f\u4ec0\u4e48\u6837\u5b50\u3002\u6211\u4eec\u9996\u5148\u505a\u7684\u662f\u58f0\u660e\u53d8\u91cf\u6765\u5b58\u50a8\u539f\u59cb\u7684 XML \u6587\u6863\u4ee5\u53ca\u51c6\u5907\u6587\u6863\u7684\u5185\u5b58\u89e3\u6790\u6811\u7684\u53e5\u67c4\u3002\u63a5\u4e0b\u6765\u662f\u4e24\u4e2a\u8868\u53d8\u91cf\u3002\u7b2c\u4e00\u4e2a\u5c06\u5b58\u50a8 OPENXML() \u51fd\u6570\u7684\u7ed3\u679c\uff0c\u800c\u7b2c\u4e8c\u4e2a\u53ea\u662f\u4fdd\u5b58\u4e00\u4e9b\u6211\u4eec\u6a21\u62df\u4ece\u4eba\u529b\u8d44\u6e90\u5e94\u7528\u7a0b\u5e8f\u4e2d\u63d0\u53d6\u7684\u5185\u90e8\u5458\u5de5\u6570\u636e\uff0c\u8fd9\u4e9b\u6570\u636e\u7528\u4e8e\u586b\u5145 Employees \u8868\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5728\u8c03\u7528 OPENXML() \u51fd\u6570\u4e4b\u524d\u89e3\u6790 XML \u6570\u636e\uff0c\u5e76\u5c06\u7ed3\u679c\u63d2\u5165\u5230\u8868\u53d8\u91cf\u4e2d\u3002\u4e4b\u540e\uff0c\u6211\u4eec\u8fd0\u884c\u67e5\u8be2\u4ee5\u590d\u5236\u6570\u636e\u5e76\u63d2\u5165\u5230\u8868\u4e2d\u3002\u8fd9\u4e9b INSERT \u8bed\u53e5\u88ab\u5305\u88c5\u5728\u4e00\u4e2a\u4e8b\u52a1\u4e2d\uff08\u5c06\u5728\u7b2c 10 \u7ae0\u8ba8\u8bba\uff09\uff0c\u8fd9\u610f\u5473\u7740\u5982\u679c\u5176\u4e2d\u4e00\u4e2a\u63d2\u5165\u64cd\u4f5c\u5931\u8d25\uff0c\u6240\u6709\u63d2\u5165\u90fd\u5c06\u56de\u6eda\u3002\u8fd9\u53ef\u4ee5\u9632\u6b62\u6211\u4eec\u5728\u8868\u4e4b\u95f4\u51fa\u73b0\u4e0d\u4e00\u81f4\u7684\u6570\u636e\uff0c\u4ece\u800c\u5728\u5931\u8d25\u65f6\u9700\u8981\u624b\u52a8\u5904\u7406\u3002\u5728\u4e8b\u52a1\u5f00\u59cb\u4e4b\u524d\uff0c\u5df2\u7ecf\u542f\u7528\u4e86 XACT_ABORT\u3002\u5373\u4f7f\u8bed\u53e5\u53ea\u662f\u56e0\u8f7b\u5fae\u9519\u8bef\uff08\u4f8b\u5982\u5916\u952e\u7ea6\u675f\u5931\u8d25\uff09\u800c\u5931\u8d25\uff0c\u8fd9\u4e5f\u4f1a\u963b\u6b62\u4e8b\u52a1\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @RawContractDetails XML ;<\/p>\n<p>DECLARE @ParsedContractDetails INT ;<\/p>\n<p>DECLARE @ShreddedData TABLE (<\/p>\n<p>EmployeeID \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 INT<\/p>\n<p>, FirstName \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0NVARCHAR(32)<\/p>\n<p>, LastName \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NVARCHAR(32)<\/p>\n<p>, DateOfBirth \u00a0 \u00a0 \u00a0 \u00a0 \u00a0DATE<\/p>\n<p>, ContractStartDate \u00a0 \u00a0DATE<\/p>\n<p>, ContractEndDate \u00a0 \u00a0 \u00a0DATE<\/p>\n<p>, Skill \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0NVARCHAR(30)<\/p>\n<p>) ;<\/p>\n<p>DECLARE @InternalEmployeeData TABLE (<\/p>\n<p>EmployeeStartDate \u00a0 \u00a0 \u00a0 \u00a0DATE<\/p>\n<p>, ManagerID \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0SMALLINT<\/p>\n<p>, Salary \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MONEY<\/p>\n<p>, Department \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NVARCHAR(64)<\/p>\n<p>, DepartmentCode \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NCHAR(2)<\/p>\n<p>, Role \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NVARCHAR(64)<\/p>\n<p>, WeeklyContractedHours \u00a0 \u00a0INT<\/p>\n<p>, StaffOrContract \u00a0 \u00a0 \u00a0 \u00a0 \u00a0BIT<\/p>\n<p>, ContractEndDate \u00a0 \u00a0 \u00a0 \u00a0 \u00a0DATE<\/p>\n<p>, ManagerHierarchyID \u00a0 \u00a0 \u00a0 HIERARCHYID<\/p>\n<p>) ;<\/p>\n<p>&nbsp;<\/p>\n<p>INSERT INTO @InternalEmployeeData<\/p>\n<p>VALUES (&#8216;20230101&#8217;, 14, 39000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Warehouse Operative&#8217;, 40, 0, &#8216;20231231&#8217;, &#8216;\/1\/2\/2\/1\/&#8217;) ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @RawContractDetails = N'&lt;EmployeeContracts&gt;<\/p>\n<p>&lt;Employee&gt;<\/p>\n<p>&lt;EmployeeID&gt;23&lt;\/EmployeeID&gt;<\/p>\n<p>&lt;FirstName&gt;Robert&lt;\/FirstName&gt;<\/p>\n<p>&lt;LastName&gt;Blake&lt;\/LastName&gt;<\/p>\n<p>&lt;DateOfBirth&gt;19781212&lt;\/DateOfBirth&gt;<\/p>\n<p>&lt;Contracts&gt;<\/p>\n<p>&lt;Contract&gt;<\/p>\n<p>&lt;StartDate&gt;20200101&lt;\/StartDate&gt;<\/p>\n<p>&lt;EndDate&gt;20200603&lt;\/EndDate&gt;<\/p>\n<p>&lt;Skills&gt;<\/p>\n<p>&lt;Skill&gt;Forklift driver&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Picker&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Packer&lt;\/Skill&gt;<\/p>\n<p>&lt;\/Skills&gt;<\/p>\n<p>&lt;\/Contract&gt;<\/p>\n<p>&lt;Contract&gt;<\/p>\n<p>&lt;StartDate&gt;20210101&lt;\/StartDate&gt;<\/p>\n<p>&lt;EndDate&gt;20211231&lt;\/EndDate&gt;<\/p>\n<p>&lt;Skills&gt;<\/p>\n<p>&lt;Skill&gt;Picker&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Stock Take&lt;\/Skill&gt;<\/p>\n<p>&lt;\/Skills&gt;<\/p>\n<p>&lt;\/Contract&gt;<\/p>\n<p>&lt;\/Contracts&gt;<\/p>\n<p>&lt;\/Employee&gt;<\/p>\n<p>&lt;\/EmployeeContracts&gt;&#8217; ;<\/p>\n<p>&nbsp;<\/p>\n<p>EXEC sp_xml_preparedocument @ParsedContractDetails OUTPUT, @RawContractDetails ;<\/p>\n<p>&nbsp;<\/p>\n<p>INSERT INTO @ShreddedData \u00a0 \u00a0#D<\/p>\n<p>SELECT *<\/p>\n<p>FROM OPENXML(@ParsedContractDetails, &#8216;\/EmployeeContracts\/Employee\/Contracts\/Contract\/Skills\/Skill&#8217;, 2)<\/p>\n<p>WITH (<\/p>\n<p>EmployeeID \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 SMALLINT \u00a0 \u00a0 \u00a0 \u00a0&#8216;..\/..\/..\/..\/EmployeeID&#8217;,<\/p>\n<p>FirstName \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0NVARCHAR(32) \u00a0 \u00a0&#8216;..\/..\/..\/..\/FirstName&#8217;,<\/p>\n<p>LastName \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NVARCHAR(32) \u00a0 \u00a0&#8216;..\/..\/..\/..\/LastName&#8217;,<\/p>\n<p>DateOfBirth \u00a0 \u00a0 \u00a0 \u00a0 \u00a0DATE \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8216;..\/..\/..\/..\/DateOfBirth&#8217;,<\/p>\n<p>ContractStartDate \u00a0 \u00a0DATE \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8216;..\/..\/StartDate&#8217;,<\/p>\n<p>ContractEndDate \u00a0 \u00a0 \u00a0DATE \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8216;..\/..\/EndDate&#8217;,<\/p>\n<p>Skill \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0NVARCHAR(30) \u00a0 \u00a0&#8216;text()&#8217;<\/p>\n<p>) ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET XACT_ABORT ON ;<\/p>\n<p>&nbsp;<\/p>\n<p>BEGIN TRANSACTION<\/p>\n<p>INSERT INTO dbo.Employees<\/p>\n<p>SELECT<\/p>\n<p>s.EmployeeID<\/p>\n<p>, s.FirstName<\/p>\n<p>, s.LastName<\/p>\n<p>, s.DateOfBirth<\/p>\n<p>, i.EmployeeStartDate<\/p>\n<p>, i.ManagerID<\/p>\n<p>, i.Salary<\/p>\n<p>, i.Department<\/p>\n<p>, i.DepartmentCode<\/p>\n<p>, i.Role<\/p>\n<p>, i.WeeklyContractedHours<\/p>\n<p>, i.StaffOrContract<\/p>\n<p>, i.ContractEndDate<\/p>\n<p>, i.ManagerHierarchyID<\/p>\n<p>FROM @ShreddedData s<\/p>\n<p>INNER JOIN @InternalEmployeeData i<\/p>\n<p>ON 1=1<\/p>\n<p>GROUP BY<\/p>\n<p>s.EmployeeID<\/p>\n<p>, s.FirstName<\/p>\n<p>, s.LastName<\/p>\n<p>, s.DateOfBirth<\/p>\n<p>, i.EmployeeStartDate<\/p>\n<p>, i.ManagerID<\/p>\n<p>, i.Salary<\/p>\n<p>, i.Department<\/p>\n<p>, i.DepartmentCode<\/p>\n<p>, i.Role<\/p>\n<p>, i.WeeklyContractedHours<\/p>\n<p>, i.StaffOrContract<\/p>\n<p>, i.ContractEndDate<\/p>\n<p>, i.ManagerHierarchyID ;<\/p>\n<p>&nbsp;<\/p>\n<p>INSERT INTO dbo.ContractHistory(EmployeeID, ContractStartDate, ContractEndDate)<\/p>\n<p>SELECT<\/p>\n<p>EmployeeID<\/p>\n<p>, ContractStartDate<\/p>\n<p>, ContractEndDate<\/p>\n<p>FROM @ShreddedData<\/p>\n<p>GROUP BY<\/p>\n<p>EmployeeID<\/p>\n<p>, ContractStartDate<\/p>\n<p>, ContractEndDate ;<\/p>\n<p>&nbsp;<\/p>\n<p>INSERT INTO dbo.ContractSkills(ContractHistoryID, SkillID)<\/p>\n<p>SELECT<\/p>\n<p>ch.ContractHistoryID<\/p>\n<p>, s.SkillsID<\/p>\n<p>FROM @ShreddedData sd<\/p>\n<p>INNER JOIN dbo.Skills s<\/p>\n<p>ON TRIM(s.Skill) = TRIM(sd.Skill)<\/p>\n<p>INNER JOIN dbo.ContractHistory ch<\/p>\n<p>ON sd.EmployeeID = ch.EmployeeID<\/p>\n<p>AND sd.ContractStartDate = ch.ContractStartDate<\/p>\n<p>AND sd.ContractEndDate = ch.ContractEndDate ;<\/p>\n<p>&nbsp;<\/p>\n<p>COMMIT<\/p>\n<p>&nbsp;<\/p>\n<p>EXEC sp_xml_removedocument @ParsedContractDetails ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u597d\u5427\uff0c\u90a3\u786e\u5b9e\u662f\u8f9b\u82e6\u7684\u5de5\u4f5c\uff0c\u5bf9\u5427\uff1f\u5bf9 SQL Server \u6765\u8bf4\u4e5f\u662f\u5982\u6b64\uff01\u5728\u6211\u7684\u5b9e\u9a8c\u73af\u5883\u4e2d\uff0c\u8fd9\u662f\u4e00\u4e2a t2.large EC2 \u5b9e\u4f8b\uff0c\u53ea\u8fd0\u884c\u8fd9\u4e2a\u811a\u672c\uff0c\u6267\u884c\u8be5\u811a\u672c\u82b1\u8d39\u4e86 31 \u6beb\u79d2\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5c06\u4e94\u884c\u6570\u636e\u5904\u7406\u6210\u4e09\u4e2a\u8868\u53ea\u7528\u4e86 31 \u6beb\u79d2\u3002\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u6240\u505a\u7684\u53ea\u662f\u62c6\u5206\u6570\u636e\u3002\u5728\u4e0b\u4e00\u90e8\u5206\uff0c\u6211\u4eec\u5c06\u770b\u4e00\u4e0b\u91cd\u65b0\u6784\u5efa XML \u6587\u6863\u7684\u8fc7\u7a0b\uff0c\u4ee5\u4fbf\u5c06\u5176\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002\u4e5f\u8bb8\u4f60\u5f00\u59cb\u660e\u767d\u4e3a\u4ec0\u4e48\u6211\u4e0d\u63a8\u8350\u5728\u6211\u4eec\u7684\u7279\u5b9a\u7528\u4f8b\u4e2d\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u4e86\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u91cd\u5efa XML<\/strong><\/p>\n<p>\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u5c06 XML \u6570\u636e\u62c6\u5206\u6210\u8868\u683c\uff0c\u6211\u4eec\u9700\u8981\u7f16\u5199 ETL \u7528\u4e8e\u5c06\u6570\u636e\u53d1\u9001\u5230\u4ed3\u5e93\u5e94\u7528\u7a0b\u5e8f\u7684\u8fc7\u7a0b\u3002\u8fd9\u610f\u5473\u7740\u9700\u8981\u4ece\u5b58\u50a8\u5728\u8868\u683c\u4e2d\u7684\u6570\u636e\u91cd\u5efa XML \u6587\u6863\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5e26\u6709 FOR XML \u5b50\u53e5\u7684 SELECT \u8bed\u53e5\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002FOR XML \u6709\u56db\u79cd\u53ef\u80fd\u7684\u6a21\u5f0f\uff0c\u8fd9\u4e9b\u6a21\u5f0f\u5728\u8868 3.3 \u4e2d\u6709\u8be6\u7ec6\u8bf4\u660e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6a21\u5f0f\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8bf4\u660e<\/p>\n<p>RAW\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u6784\u5efa XML \u7684\u6700\u57fa\u672c\u6a21\u5f0f\u3002\u5b83\u751f\u6210\u4e00\u4e2a\u5e73\u94fa\u7684 XML \u6587\u6863\uff0c\u6bcf\u884c\u5bf9\u5e94\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n<p>AUTO \u00a0\u00a0 \u751f\u6210\u5e26\u5d4c\u5957\u5143\u7d20\u7684 XML \u6587\u6863\u3002\u5d4c\u5957\u7531\u67e5\u8be2\u4e2d\u7684\u8fde\u63a5\u6761\u4ef6\u63a7\u5236\u3002\u81ea\u52a8\u683c\u5f0f\u5316\u610f\u5473\u7740\u6211\u4eec\u5bf9 XML \u7684\u683c\u5f0f\u63a7\u5236\u975e\u5e38\u6709\u9650\u3002<\/p>\n<p>PATH\u00a0\u00a0\u00a0\u00a0\u00a0 \u901a\u8fc7\u5c06\u67e5\u8be2\u4e2d\u7684\u5217\u6620\u5c04\u5230\u5c42\u6b21\u7ed3\u6784\u4e2d\u6307\u5b9a\u4f4d\u7f6e\u7684 XML \u8282\u70b9\uff0c\u53ef\u4ee5\u9ad8\u7ea7\u63a7\u5236 XML \u6587\u6863\u7684\u683c\u5f0f\u3002<\/p>\n<p>EXPLICIT \u63d0\u4f9b\u4e0e PATH \u6a21\u5f0f\u7c7b\u4f3c\u7684\u683c\u5f0f\u63a7\u5236\uff0c\u4f46\u8fc7\u4e8e\u590d\u6742\u3002\u901a\u5e38\u4e0d\u9700\u8981\u4f7f\u7528\u6b64\u6a21\u5f0f\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e3a\u4e86\u4e3a\u6211\u4eec\u7684 XML \u6587\u6863\u521b\u5efa\u6b63\u786e\u7684\u7ed3\u6784\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528 FOR XML PATH\uff0c\u5e76\u7ed3\u5408\u4f7f\u7528\u5b50\u67e5\u8be2\uff0c\u5b50\u67e5\u8be2\u4e5f\u4f7f\u7528 FOR XML PATH \u5b50\u53e5\u3002\u9700\u8981\u5b50\u67e5\u8be2\u7684\u539f\u56e0\u662f\u4e3a\u4e86\u5904\u7406\u6587\u6863\u5b50\u7ea7\u4e2d\u91cd\u590d\u7684\u5143\u7d20\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5217\u8868 3.17 \u4e2d\u7684\u67e5\u8be2\u6f14\u793a\u4e86\u6211\u4eec\u5982\u4f55\u901a\u8fc7\u4f7f\u7528\u4e24\u5c42\u5b50\u67e5\u8be2\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002\u6700\u5185\u5c42\u7684\u67e5\u8be2\u8fd4\u56de\u4e0e\u7ed9\u5b9a\u5408\u540c\u76f8\u5173\u7684\u6280\u80fd\u3002\u8fd9\u4e9b\u7ed3\u679c\u4f7f\u7528 FOR XML PATH \u8f6c\u6362\u4e3a XML\u3002\u6b64\u5b50\u53e5\u4f7f\u7528 TYPE \u5173\u952e\u5b57\u6765\u5b9a\u4e49\u7ed3\u679c\u5c06\u662f\u683c\u5f0f\u826f\u597d\u7684 XML\uff0c\u5e76\u4f7f\u7528 ROOT \u6307\u5b9a\u6587\u6863\u4e2d\u6839\u8282\u70b9\u7684\u540d\u79f0\u3002\u5916\u5c42\u5b50\u67e5\u8be2\u4f7f\u7528\u76f8\u540c\u7684\u8fc7\u7a0b\u4ece\u91cd\u590d\u7684 Contracts \u5143\u7d20\u4e2d\u63d0\u53d6\u8be6\u7ec6\u4fe1\u606f\u3002\u6700\u540e\uff0c\u5916\u5c42\u67e5\u8be2\u8fd4\u56de\u5458\u5de5\u8be6\u7ec6\u4fe1\u606f\uff0c\u8fd9\u4e9b\u4fe1\u606f\u5c06\u4f4d\u4e8e\u5c42\u7ea7\u7ed3\u6784\u7684\u9876\u7aef\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>SELECT<\/p>\n<p>e.EmployeeID &#8216;EmployeeID&#8217;<\/p>\n<p>, e.FirstName &#8216;FirstName&#8217;<\/p>\n<p>, e.LastName &#8216;LastName&#8217;<\/p>\n<p>, e.DateOfBirth &#8216;DateOfBirth&#8217;<\/p>\n<p>, (<\/p>\n<p>SELECT<\/p>\n<p>ch.ContractStartDate &#8216;StartDate&#8217;<\/p>\n<p>, ch.ContractEndDate &#8216;EndDate&#8217;<\/p>\n<p>, (<\/p>\n<p>SELECT<\/p>\n<p>s.Skill &#8216;Skill&#8217;<\/p>\n<p>FROM dbo.Skills s<\/p>\n<p>INNER JOIN dbo.ContractSkills cs<\/p>\n<p>ON s.SkillsID = cs.SkillID<\/p>\n<p>WHERE cs.ContractHistoryID = ch.ContractHistoryID<\/p>\n<p>FOR XML PATH(&#8221;), TYPE, ROOT(&#8216;Skills&#8217;)<\/p>\n<p>)<\/p>\n<p>FROM dbo.ContractHistory ch<\/p>\n<p>WHERE EmployeeID = e.EmployeeID<\/p>\n<p>FOR XML PATH(&#8216;Contract&#8217;), TYPE, ROOT(&#8216;Contracts&#8217;)<\/p>\n<p>)<\/p>\n<p>FROM dbo.Employees e<\/p>\n<p>WHERE EmployeeID = 23<\/p>\n<p>FOR XML PATH(&#8216;Employee&#8217;), ROOT(&#8216;EmployeeContracts&#8217;) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u5728\u6211\u7684\u5b9e\u9a8c\u5ba4\u73af\u5883\u4e2d\uff0c\u8fd9\u4e2a\u67e5\u8be2\u82b1\u4e8652\u6beb\u79d2\u5b8c\u6210\u3002\u73b0\u5728\u60f3\u8c61\u4e00\u4e0b\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u8fd9\u4e9b\u8fc7\u7a0b\u88ab\u591a\u4eba\u4e0d\u65ad\u8fd0\u884c\u3002\u518d\u60f3\u60f3\u8fd9\u4e9b\u8fc7\u7a0b\u9700\u8981\u5728\u5927\u578b\u590d\u6742\u7684XML\u6587\u6863\u4e0a\u8fd0\u884c\u7684\u60c5\u51b5\u3002\u4f60\u53ef\u4ee5\u7406\u89e3\u4e3a\u4ec0\u4e48\u8fd9\u53ef\u80fd\u4f1a\u53d8\u5f97\u76f8\u5f53\u6602\u8d35\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u901a\u8fc7\u5c06\u6570\u636e\u5b58\u50a8\u4e3a XML \u6765\u907f\u514d\u5f00\u9500<\/strong><\/p>\n<p>\u5c06 XML \u8f6c\u6362\u4e3a\u5173\u7cfb\u6570\u636e\u518d\u8f6c\u6362\u56de\u53bb\u82b1\u8d39\u4e86\u76f8\u5f53\u591a\u7684\u52aa\u529b\uff0c\u5e76\u4e14\u603b\u5171\u8017\u65f6 83 \u6beb\u79d2\u3002\u5982\u679c\u6211\u4eec\u4ee5 XML \u683c\u5f0f\u5b58\u50a8\u6570\u636e\uff0c\u672c\u53ef\u4ee5\u8282\u7701\u5f00\u53d1\u65f6\u95f4\u4ee5\u53ca\u7f16\u8bd1\/\u6267\u884c\u65f6\u95f4\u3002\u90a3\u4e48\uff0c\u8ba9\u6211\u4eec\u6765\u63a2\u8ba8\u5982\u679c\u4ee5\u539f\u751f\u683c\u5f0f\u5b58\u50a8\u6570\u636e\uff0c\u5bf9\u5f00\u53d1\u548c\u5904\u7406\u4f1a\u4ea7\u751f\u4ec0\u4e48\u5f71\u54cd\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7531\u4e8e\u5458\u5de5\u7684\u6280\u80fd\u548c\u5408\u540c\u7684\u6240\u6709\u8be6\u7ec6\u4fe1\u606f\u90fd\u5b58\u50a8\u5728\u5355\u4e2a XML \u6587\u6863\u4e2d\uff0c\u56e0\u6b64\u4e0d\u9700\u8981 EmployeeContracts \u548c EmployeeSkills \u8868\u3002\u76f8\u53cd\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5c06 XML \u6587\u6863\u63d2\u5165\u5230 Employees \u8868\u4e2d\u3002\u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u66f4\u65b0 Employees \u8868\u5e76\u6dfb\u52a0\u4e00\u4e2a\u540d\u4e3a PreviousContracts \u7684\u5217\uff0c\u7528\u4e8e\u5b58\u50a8\u8fd9\u4e9b\u6570\u636e\u3002\u4e0b\u9762\u7684\u793a\u4f8b\u5305\u542b\u4e86\u4e00\u4e2a\u6211\u4eec\u53ef\u4ee5\u8fd0\u884c\u4ee5\u5b9e\u73b0\u6b64\u76ee\u7684\u7684\u547d\u4ee4\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>ALTER TABLE dbo.Employees<\/p>\n<p>ADD PreviousContracts XML NULL ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u5728\u6211\u4eec\u7684\u5177\u4f53\u573a\u666f\u4e2d\uff0c\u6211\u4eec\u65e0\u6cd5\u907f\u514d\u4f7f\u7528\u5c11\u91cf\u7684 XQuery\u3002\u8fd9\u662f\u56e0\u4e3a\u6570\u636e\u5c06\u57fa\u4e8e EmployeeID \u8fdb\u884c\u952e\u63a7\uff0c\u800c\u8be5 ID \u662f\u7531 XML \u6587\u6863\u4e2d\u7684 Total Warehouse Jobs \u63d0\u4f9b\u7684\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u63d0\u53d6\u6b64\u503c\u4ee5\u53ca\u5458\u5de5\u7684\u59d3\u540d\u548c\u51fa\u751f\u65e5\u671f\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u6e05\u5355 3.19 \u4e2d\u6f14\u793a\u4e86\u4e00\u4e2a\u53ef\u4ee5\u7528\u6765\u5c06\u65b0\u7528\u6237\u6dfb\u52a0\u5230 Employees \u8868\u7684\u811a\u672c\u3002\u4e0e\u524d\u9762\u7684\u4f8b\u5b50\u4e00\u6837\uff0c\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u540d\u4e3a @InternalEmployeeData \u7684\u8868\u53d8\u91cf\u6765\u6a21\u62df\u6211\u4eec\u7684 HR \u7cfb\u7edf\uff0c\u4ee5\u63d0\u4f9b\u4e00\u4e9b\u5c06\u586b\u5145 Employees \u8868\u7684\u503c\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528 XQuery \u7684 value() \u65b9\u6cd5\u4ece XML \u6587\u6863\u4e2d\u63d0\u53d6 EmployeeID\u3001FirstName\u3001LastName \u548c DateOfBirth \u8282\u70b9\u3002value() \u65b9\u6cd5\u4f20\u5165\u8981\u63d0\u53d6\u8282\u70b9\u7684 XPath\uff0c\u4ee5\u53ca\u8282\u70b9\u5c06\u6620\u5c04\u5230\u7684 SQL Server \u6570\u636e\u7c7b\u578b\u3002value() \u9700\u8981\u4e00\u4e2a\u5355\u4e00\u7684\u503c\uff0c\u56e0\u6b64\u5373\u4f7f\u8282\u70b9\u4e0d\u91cd\u590d\uff0c\u4e5f\u5fc5\u987b\u6307\u5b9a\u6240\u9700\u7684\u8282\u70b9\u7d22\u5f15\u3002\u8bf7\u6ce8\u610f\uff0cXML \u6587\u6863\u4e2d\u7684 EmployeeID \u5df2\u88ab\u9012\u589e\uff0c\u4ee5\u907f\u514d\u7531\u4e8e\u8fdd\u53cd\u4e3b\u952e\u7ea6\u675f\u800c\u5bfc\u81f4\u63d2\u5165\u5931\u8d25\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @RawContractDetails XML ;<\/p>\n<p>DECLARE @InternalEmployeeData TABLE (<\/p>\n<p>EmployeeStartDate \u00a0 \u00a0 \u00a0 \u00a0DATE<\/p>\n<p>, ManagerID \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0SMALLINT<\/p>\n<p>, Salary \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MONEY<\/p>\n<p>, Department \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NVARCHAR(64)<\/p>\n<p>, DepartmentCode \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NCHAR(2)<\/p>\n<p>, Role \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NVARCHAR(64)<\/p>\n<p>, WeeklyContractedHours \u00a0 \u00a0INT<\/p>\n<p>, StaffOrContract \u00a0 \u00a0 \u00a0 \u00a0 \u00a0BIT<\/p>\n<p>, ContractEndDate \u00a0 \u00a0 \u00a0 \u00a0 \u00a0DATE<\/p>\n<p>, ManagerHierarchyID \u00a0 \u00a0 \u00a0 HIERARCHYID<\/p>\n<p>) ;<\/p>\n<p>&nbsp;<\/p>\n<p>INSERT INTO @InternalEmployeeData<\/p>\n<p>VALUES (&#8216;20230101&#8217;, 14, 39000, &#8216;Manufacturing&#8217;, &#8216;MA&#8217;, &#8216;Warehouse Operative&#8217;, 40, 0, &#8216;20231231&#8217;, &#8216;\/1\/2\/2\/1\/&#8217;) ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @RawContractDetails = N'&lt;EmployeeContracts&gt;<\/p>\n<p>&lt;Employee&gt;<\/p>\n<p>&lt;EmployeeID&gt;25&lt;\/EmployeeID&gt;<\/p>\n<p>&lt;FirstName&gt;Robert&lt;\/FirstName&gt;<\/p>\n<p>&lt;LastName&gt;Blake&lt;\/LastName&gt;<\/p>\n<p>&lt;DateOfBirth&gt;19781212&lt;\/DateOfBirth&gt;<\/p>\n<p>&lt;Contracts&gt;<\/p>\n<p>&lt;Contract&gt;<\/p>\n<p>&lt;StartDate&gt;20200101&lt;\/StartDate&gt;<\/p>\n<p>&lt;EndDate&gt;20200603&lt;\/EndDate&gt;<\/p>\n<p>&lt;Skills&gt;<\/p>\n<p>&lt;Skill&gt;Forklift driver&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Picker&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Packer&lt;\/Skill&gt;<\/p>\n<p>&lt;\/Skills&gt;<\/p>\n<p>&lt;\/Contract&gt;<\/p>\n<p>&lt;Contract&gt;<\/p>\n<p>&lt;StartDate&gt;20210101&lt;\/StartDate&gt;<\/p>\n<p>&lt;EndDate&gt;20211231&lt;\/EndDate&gt;<\/p>\n<p>&lt;Skills&gt;<\/p>\n<p>&lt;Skill&gt;Picker&lt;\/Skill&gt;<\/p>\n<p>&lt;Skill&gt;Stock Take&lt;\/Skill&gt;<\/p>\n<p>&lt;\/Skills&gt;<\/p>\n<p>&lt;\/Contract&gt;<\/p>\n<p>&lt;\/Contracts&gt;<\/p>\n<p>&lt;\/Employee&gt;<\/p>\n<p>&lt;\/EmployeeContracts&gt;&#8217; ;<\/p>\n<p>&nbsp;<\/p>\n<p>INSERT INTO dbo.Employees<\/p>\n<p>SELECT<\/p>\n<p>@RawContractDetails.value(&#8216;(\/EmployeeContracts\/Employee\/EmployeeID)[1]&#8217;, &#8216;SMALLINT&#8217;) AS EmployeeID<\/p>\n<p>,@RawContractDetails.value(&#8216;(\/EmployeeContracts\/Employee\/FirstName)[1]&#8217;, &#8216;NVARCHAR(32)&#8217;) AS FirstName<\/p>\n<p>,@RawContractDetails.value(&#8216;(\/EmployeeContracts\/Employee\/LastName)[1]&#8217;, &#8216;NVARCHAR(32)&#8217;) AS LastName<\/p>\n<p>,@RawContractDetails.value(&#8216;(\/EmployeeContracts\/Employee\/DateOfBirth)[1]&#8217;, &#8216;DATE&#8217;) AS DateOfBirth<\/p>\n<p>, EmployeeStartDate<\/p>\n<p>, ManagerID<\/p>\n<p>, Salary<\/p>\n<p>, Department<\/p>\n<p>, DepartmentCode<\/p>\n<p>, Role<\/p>\n<p>, WeeklyContractedHours<\/p>\n<p>, StaffOrContract<\/p>\n<p>, ContractEndDate<\/p>\n<p>, ManagerHierarchyID<\/p>\n<p>, @RawContractDetails AS PreviousContracts<\/p>\n<p>FROM @InternalEmployeeData ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u5728\u6211\u7684\u5b9e\u9a8c\u73af\u5883\u4e2d\uff0c\u8fd9\u4e2a\u811a\u672c\u6267\u884c\u82b1\u8d39\u4e8633\u6beb\u79d2\u3002\u6211\u4eec\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u5217\u8868\u4e2d\u7684\u7b80\u5355SELECT\u8bed\u53e5\u6765\u68c0\u7d22\u4ed3\u5e93\u5e94\u7528\u7a0b\u5e8f\u7684XML\u6587\u6863\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>SELECT<\/p>\n<p>PreviousContracts<\/p>\n<p>FROM dbo.Employees<\/p>\n<p>WHERE EmployeeID = 25 ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u5728\u6211\u7684\u5b9e\u9a8c\u73af\u5883\u4e2d\uff0c\u8fd9\u6761 SELECT \u8bed\u53e5\u7684\u6267\u884c\u65f6\u95f4\u4e0d\u5230 1 \u6beb\u79d2\u3002\u5982\u679c\u6211\u4eec\u56db\u820d\u4e94\u5165\u5230 1 \u6beb\u79d2\uff0c\u8fd9\u610f\u5473\u7740\u63d2\u5165\u64cd\u4f5c\u548c XML \u6570\u636e\u8fd4\u56de\u7684\u603b\u8017\u65f6\u4e3a 34 \u6beb\u79d2\u3002\u8fd9\u610f\u5473\u7740\uff0c\u603b\u4f53\u800c\u8a00\uff0c\u5f53\u6211\u4eec\u907f\u514d\u62c6\u5206\uff08shredding\uff09\u65f6\uff0c\u7aef\u5230\u7aef\u7684\u5904\u7406\u901f\u5ea6\u63d0\u9ad8\u4e86\u4e24\u500d\u4ee5\u4e0a\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8fd9\u662f\u5426\u610f\u5473\u7740\u6211\u4eec\u6c38\u8fdc\u4e0d\u5e94\u8be5\u62c6\u5206XML\u6570\u636e\uff1f\u4e0d\uff0c\u7edd\u5bf9\u4e0d\u662f\uff01\u62c6\u5206\u6570\u636e\u6709\u5f88\u591a\u5408\u7406\u7684\u7406\u7531\u3002\u6211\u901a\u5e38\u9075\u5faa\u7684\u4e00\u4e2a\u901a\u7528\u539f\u5219\u662f\uff0cT-SQL\u6bd4XQuery\u9ad8\u6548\u5f97\u591a\u3002\u56e0\u6b64\uff0c\u5982\u679c\u6211\u4eec\u7684\u573a\u666f\u9700\u8981\u6211\u4eec\u9891\u7e41\u67e5\u8be2\u6570\u636e\uff0c\u90a3\u4e48\u62c6\u5206\u6570\u636e\u662f\u4e2a\u597d\u4e3b\u610f\u3002\u76f8\u53cd\uff0c\u5982\u679c\u6211\u4eec\u7ecf\u5e38\u5199\u5165\u6570\u636e\u4f46\u5f88\u5c11\u67e5\u8be2\uff0c\u90a3\u4e48\u4ee5\u539f\u751fXML\u683c\u5f0f\u5b58\u50a8\u6570\u636e\u662f\u6700\u4f73\u65b9\u6cd5\u3002\u6211\u4eec\u5e94\u8be5\u907f\u514d\u7684\u9519\u8bef\u662f\u603b\u662f\u62c6\u5206\u6570\u636e\uff08\u6216\u8005\uff0c\u540c\u6837\u7684\uff0c\u603b\u662f\u4ee5XML\u5b58\u50a8\u6570\u636e\uff09\u3002\u76f8\u53cd\uff0c\u5e94\u6839\u636e\u5e94\u7528\u7684\u9700\u6c42\u6765\u505a\u8bbe\u8ba1\u51b3\u5b9a\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u9519\u8bef10# \u5ffd\u7565 JSON<\/strong><\/p>\n<p>\u6b63\u5982SQL\u5f00\u53d1\u4eba\u5458\u503e\u5411\u4e8e\u907f\u514d\u4f7f\u7528XML\u6570\u636e\u4e00\u6837\uff0c\u4ed6\u4eec\u4e5f\u503e\u5411\u4e8e\u907f\u514d\u4f7f\u7528JSON\u6570\u636e\u3002\u6b63\u5982\u6211\u4eec\u5728\u8ba8\u8bbaXML\u65f6\u770b\u5230\u7684\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u8868\u8bbe\u8ba1\u4e0d\u7406\u60f3\u548c\u6027\u80fd\u4e0d\u4f73\u3002\u8ba9\u6211\u4eec\u5047\u8bbe\u6211\u4eec\u88ab\u8981\u6c42\u6269\u5c55\u5458\u5de5\u5b9e\u4f53\u7684\u6570\u636e\u6a21\u5f0f\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u5b58\u50a8\u4ed6\u4eec\u7684\u5bb6\u5ead\u5730\u5740\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728 SQL Server \u4e2d\u5efa\u6a21\u5730\u5740\u7684\u5178\u578b\u6a21\u578b\u662f\u521b\u5efa\u4e00\u4e2a Addresses \u8868\uff0c\u4f7f\u7528 AddressID \u4f5c\u4e3a\u4e3b\u952e\uff0c\u7136\u540e\u5728 Employees \u8868\u4ee5\u53ca\u5176\u4ed6\u53ef\u80fd\u6d89\u53ca\u5730\u5740\u7684\u8868\uff08\u4f8b\u5982 HR \u6570\u636e\u5e93\u4e2d\u7684 Offices \u6216 Sites\uff09\u4e2d\u4e5f\u6709\u4e00\u4e2a\u540c\u540d\u5217\u3002Employees \u8868\u4e2d\u7684\u8fd9\u4e00\u5217\u5c06\u4f1a\u6709\u5916\u952e\u7ea6\u675f\uff0c\u4ee5\u786e\u4fdd\u53ea\u80fd\u5b58\u50a8 Addresses \u8868\u4e2d\u7684\u6709\u6548\u503c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8fd9\u4e2a\u6a21\u578b\u53ef\u4ee5\uff0c\u4f46\u5b83\u4f1a\u53d8\u6210\u4e00\u4e2a\u5bbd\u800c\u7a00\u758f\u7684\u8868\uff0c\u56e0\u4e3a\u5e76\u975e\u6240\u6709\u5730\u5740\u90fd\u6709\u76f8\u540c\u6570\u91cf\u7684\u884c\uff0c\u800c\u4e14\u6211\u4eec\u9700\u8981\u80fd\u591f\u5904\u7406\u4efb\u4f55\u53ef\u80fd\u7684\u60c5\u51b5\u3002\u5728 MagicChoc \u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u79cd\u60c5\u51b5\u66f4\u4e3a\u4e25\u91cd\uff0c\u56e0\u4e3a\u5b83\u662f\u4e00\u5bb6\u56fd\u9645\u516c\u53f8\u3002\u60f3\u60f3\u90ae\u653f\u7f16\u7801\u5427\u3002\u5728\u82f1\u56fd\uff0c\u5b83\u4eec\u88ab\u79f0\u4e3a\u90ae\u7f16\uff0c\u5728\u6cf0\u56fd\u662f y\u00f3u d\u00ec q\u016b 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\u5177\u6709\u534a\u7ed3\u6784\u5316\u7684\u683c\u5f0f\uff0c\u53ef\u4ee5\u7701\u7565\u4e0d\u76f8\u5173\u7684\u6570\u636e\u3002\u5b83\u8d8a\u6765\u8d8a\u53d7\u6b22\u8fce\uff0c\u56e0\u4e3a\u5b83\u662f\u4e00\u79cd\u975e\u5e38\u8f7b\u91cf\u7684\u683c\u5f0f\uff0c\u6807\u7b7e\u6bd4 XML \u5c11\u5f97\u591a\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7531\u4e8e T-SQL \u5728\u67e5\u8be2\u6570\u636e\u65b9\u9762\u7684\u9ad8\u6548\u6027\uff0c\u5f53\u6211\u5728\u8fdb\u884c\u6570\u636e\u5efa\u6a21\u65f6\uff0c\u6211\u5bf9 JSON \u7684\u5904\u7406\u89c4\u5219\u4e0e\u5bf9 XML \u7684\u5904\u7406\u89c4\u5219\u76f8\u540c\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u6570\u636e\u5199\u5165\u9891\u7e41\u800c\u67e5\u8be2\u4e0d\u9891\u7e41\uff0c\u90a3\u4e48 JSON \u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002\u7136\u800c\uff0c\u5982\u679c\u6570\u636e\u88ab\u67e5\u8be2\u7684\u9891\u7387\u8fdc\u9ad8\u4e8e\u5199\u5165\u7684\u9891\u7387\uff0c\u90a3\u4e48\u6211\u66f4\u503e\u5411\u4e8e\u4ee5\u5173\u7cfb\u578b\u65b9\u5f0f\u5b58\u50a8\u6570\u636e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>JSON \u7684\u5176\u4ed6\u4f7f\u7528\u573a\u666f\u5305\u62ec\u5efa\u6a21\u90a3\u4e9b\u539f\u672c\u9700\u8981\u5728\u5173\u7cfb\u578b\u6570\u636e\u548c NoSQL \u4e4b\u95f4\u62c6\u5206\u7684\u6570\u636e\u57df\u3002\u8fd9\u662f\u56e0\u4e3a\uff0c\u5728 SQL Server \u4e2d\uff0c\u4e24\u79cd\u7c7b\u578b\u7684\u6570\u636e\u53ef\u4ee5\u5b58\u50a8\u5728\u76f8\u540c\u7684\u6a21\u5f0f\u4e2d\uff0c\u4ece\u800c\u652f\u6301\u4e0e\u91c7\u7528 JSON \u683c\u5f0f\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u7684 REST API \u6216\u5176\u4ed6\u7cfb\u7edf\u96c6\u6210\u8fdb\u884c\u901a\u4fe1\u3002\u73b0\u5728\uff0c\u5728 SQL Server \u4e2d\u5b58\u50a8\u548c\u5206\u6790\u57fa\u4e8e JSON \u7684\u65e5\u5fd7\u6570\u636e\u4e5f\u53d8\u5f97\u53ef\u884c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u90a3\u4e48\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u901a\u8fc7\u5c06\u5458\u5de5\u5730\u5740\u6570\u636e\u5efa\u6a21\u4e3a JSON \u683c\u5f0f\u6765\u907f\u514d\u5ffd\u7565 JSON \u7684\u9519\u8bef\u3002\u5982\u679c\u6211\u4eec\u7684\u5730\u5740\u53ef\u80fd\u4e0e\u591a\u4e2a\u5b9e\u4f53\u76f8\u5173\uff0c\u4f8b\u5982\u529e\u516c\u5ba4\u6216\u7ad9\u70b9\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u80fd\u4ecd\u7136\u5e0c\u671b\u5efa\u7acb\u4e00\u4e2a Addresses \u8868\uff0c\u4ee5\u4fbf JSON \u683c\u5f0f\u7684\u5730\u5740\u53ef\u4ee5\u88ab\u591a\u4e2a\u5b9e\u4f53\u4f7f\u7528\u3002\u7136\u800c\uff0c\u6211\u4eec\u786e\u4fe1 Employees \u662f\u552f\u4e00\u9700\u8981\u4e0e\u5730\u5740\u6570\u636e\u4ea4\u4e92\u7684\u5b9e\u4f53\uff0c\u56e0\u6b64\u6211\u4eec\u5c06\u5728 Employees \u8868\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u989d\u5916\u7684\u5217\u6765\u5b58\u50a8\u5730\u5740\u6570\u636e\u3002\u4e0b\u9762\u7684\u5217\u8868\u663e\u793a\u4e86\u4e00\u4e2a\u5c06\u521b\u5efa\u8be5\u5217\u7684\u547d\u4ee4\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>ALTER TABLE dbo.Employees<\/p>\n<p>ADD Address NVARCHAR(MAX) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p><strong>\u6ce8\u610f<\/strong>\uff0c\u4f46\u8bf7\u7b49\u4e00\u4e0b\uff01\u6211\u4eec\u5c06\u7528 JSON \u5bf9\u6570\u636e\u5efa\u6a21\uff0c\u90a3\u4e48\u4e3a\u4ec0\u4e48\u6211\u4eec\u521a\u521a\u521b\u5efa\u4e86\u4e00\u4e2a NVARCHAR(MAX) \u7c7b\u578b\u7684\u5217\u5462\uff1f\u7b54\u6848\u662f\uff0c\u622a\u81f3\u64b0\u5199\u672c\u6587\u65f6\uff0cAzure SQL \u6570\u636e\u5e93\u4e2d JSON \u6570\u636e\u7c7b\u578b\u4ecd\u5728\u9884\u89c8\u9636\u6bb5\uff0c\u4f46\u5bf9\u4e8e IaaS \u6216\u672c\u5730\u7684 SQL Server\uff0cJSON \u5e76\u6ca1\u6709\u81ea\u5df1\u7684\u6570\u636e\u7c7b\u578b\u3002\u5b83\u4ee5 VARCHAR \u6216 NVARCHAR \u5b58\u50a8\uff0c\u7136\u540e\u4f5c\u4e3a\u6587\u672c\u8fdb\u884c\u7d22\u5f15\u3002\u8fd9\u4f7f\u5f97 JSON \u4e0e\u4efb\u4f55\u652f\u6301\u6587\u672c\u7684 SQL Server \u529f\u80fd\u5b8c\u5168\u517c\u5bb9\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u7528\u4e8e\u5b58\u50a8\u5730\u5740\u7684 JSON \u6587\u6863\u7684\u683c\u5f0f\u3002JSON \u683c\u5f0f\u4f7f\u7528\u7b80\u5355\u7684 \u540d\u79f0:\u503c \u5bf9\uff0c\u7528&#8221;&#8221;\u62ec\u8d77\u6765\u3002\u5d4c\u5957\u4f7f\u7528 {} \u8868\u793a\u3002\u4f7f\u7528 [] \u8868\u793a\u4e00\u4e2a\u6570\u7ec4\u3002\u6211\u4eec\u7684\u5730\u5740\u6587\u6863\u4ee5 EmployeeAddress \u4e3a\u6839\uff0c\u5305\u542b EmployeeID \u548c Address \u8282\u70b9\u3002Address \u8282\u70b9\u4e0b\u8fd8\u6709\u8fdb\u4e00\u6b65\u7684\u5b50\u8282\u70b9\uff0c\u7528\u4e8e\u5b58\u50a8\u5730\u5740\u7684\u6bcf\u4e00\u884c\u3002\u6839\u636e\u6bcf\u4e2a\u5730\u5740\u7684\u9700\u6c42\uff0c\u53ef\u4ee5\u6dfb\u52a0\u989d\u5916\u7684\u884c\u6216\u66ff\u6362\u73b0\u6709\u8282\u70b9\uff0c\u8fd9\u610f\u5473\u7740\u6211\u4eec\u6d88\u9664\u4e86\u7a00\u758f\u6570\u636e\u7684\u95ee\u9898\u3002\u793a\u4f8b\u6587\u6863\u5982\u4e0b\uff1a<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>{<\/p>\n<p>&#8220;EmployeeAddress&#8221;:[<\/p>\n<p>{<\/p>\n<p>&#8220;EmployeeID&#8221;:1,<\/p>\n<p>&#8220;Address&#8221;:{<\/p>\n<p>&#8220;Line1&#8243;:&#8221;5331 Rexford Court&#8221;,<\/p>\n<p>&#8220;City&#8221;:&#8221;Montgomery&#8221;,<\/p>\n<p>&#8220;State&#8221;:&#8221;AL&#8221;,<\/p>\n<p>&#8220;ZipCode&#8221;:&#8221;36116&#8243;<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<p>]<\/p>\n<p>}<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5e26\u6709 FOR JSON \u5b50\u53e5\u7684 SELECT \u8bed\u53e5\u751f\u6210\u6b64\u6587\u6863\u3002\u6709\u4e24\u79cd FOR JSON \u5904\u7406\u9009\u9879\uff1aAUTO \u548c PATH\u3002AUTO \u53ef\u4ee5\u6839\u636e\u5217\u7684\u987a\u5e8f\u548c\u8868\u8fde\u63a5\u987a\u5e8f\u81ea\u52a8\u683c\u5f0f\u5316\u6587\u6863\u3002PATH \u6a21\u5f0f\u5219\u53ef\u4ee5\u5bf9\u683c\u5f0f\u8fdb\u884c\u66f4\u7cbe\u7ec6\u7684\u63a7\u5236\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u5c0f\u6280\u5de7<\/strong>\uff1aJSON AUTO \u53ea\u80fd\u7528\u4e8e\u8868\uff0c\u56e0\u6b64\u7406\u8bba\u4e0a\u5b83\u4e0d\u80fd\u4ee5\u6211\u4eec\u8ba1\u5212\u7684\u65b9\u5f0f\u4f7f\u7528\uff0c\u4f46\u901a\u8fc7\u5411\u4efb\u610f\u8868\u6dfb\u52a0 FROM \u5b50\u53e5\u53ef\u4ee5\u8f7b\u677e\u7ed5\u8fc7\u8fd9\u4e00\u9650\u5236\u3002\u6211\u901a\u5e38\u4f7f\u7528 sys.tables \u6765\u5b9e\u73b0\u8fd9\u4e00\u76ee\u7684\uff0c\u4f46\u4efb\u4f55\u8868\u90fd\u53ef\u4ee5\u3002\u5982\u679c\u4f7f\u7528\u8fd9\u79cd\u6280\u5de7\uff0c\u6211\u4eec\u9700\u8981\u5728 SELECT \u5b50\u53e5\u4e2d\u6dfb\u52a0 TOP 1\uff0c\u4ee5\u907f\u514d\u4e3a\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\u8fd4\u56de\u4e00\u4e2a\u8282\u70b9\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5217\u8868 3.22 \u4e2d\u7684\u67e5\u8be2\u5c06\u751f\u6210\u6211\u4eec\u7684\u793a\u4f8b JSON \u6587\u6863\u3002\u8bf7\u6ce8\u610f\uff0c\u6211\u4eec\u4f7f\u7528\u7684\u662f PATH \u6a21\u5f0f\uff0c\u56e0\u6b64\u6bcf\u4e00\u5217\u90fd\u6709\u4e00\u4e2a\u522b\u540d\uff0c\u7528\u4e8e\u6307\u5b9a\u8282\u70b9\u7684\u540d\u79f0\u53ca\u5176\u5728 JSON \u5c42\u6b21\u7ed3\u6784\u4e2d\u7684\u4f4d\u7f6e\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>SELECT<\/p>\n<p>1 AS &#8216;EmployeeID&#8217;<\/p>\n<p>, &#8216;5331 Rexford Court&#8217; AS &#8216;Address.Line1&#8217;<\/p>\n<p>, &#8216;Montgomery&#8217; \u00a0 \u00a0 \u00a0 \u00a0 AS &#8216;Address.City&#8217;<\/p>\n<p>, &#8216;AL&#8217; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AS &#8216;Address.State&#8217;<\/p>\n<p>, &#8216;36116&#8217; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0AS &#8216;Address.ZipCode&#8217;<\/p>\n<p>FOR JSON PATH, ROOT (&#8216;EmployeeAddress&#8217;) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u5217\u8868 3.23 \u4e2d\u7684\u811a\u672c\u6f14\u793a\u4e86\u5982\u679c\u6211\u4eec\u4ee5 JSON \u683c\u5f0f\u83b7\u5f97\u5730\u5740\u6570\u636e\uff0c\u5982\u4f55\u66f4\u65b0 Employees \u8868\u4ee5\u6dfb\u52a0\u5458\u5de5\u5730\u5740\u3002UPDATE \u8bed\u53e5\u7684 WHERE \u5b50\u53e5\u4f7f\u7528 JSON_VALUE() \u51fd\u6570\u4ece\u6587\u6863\u4e2d\u68c0\u7d22 EmployeeID\u3002\u8be5\u51fd\u6570\u63a5\u53d7\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u8981\u641c\u7d22\u7684 JSON \u6587\u6863\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u5b9a\u8282\u70b9\u7684\u8def\u5f84\u3002JSON \u8def\u5f84\u603b\u662f\u4ee5 $. \u5f00\u5934\uff0c\u8868\u793a\u6574\u4e2a\u6587\u6863\u3002\u6839\u8282\u70b9 EmployeeAddress \u662f\u4e00\u4e2a\u6570\u7ec4\uff08\u7528\u65b9\u62ec\u53f7\u8868\u793a\uff09\uff0c\u610f\u5473\u7740\u6211\u4eec\u9700\u8981\u4f20\u9012\u6570\u7ec4\u7d22\u5f15\u6765\u6307\u5b9a\u5e0c\u671b\u8fd4\u56de\u503c\u7684\u8bb0\u5f55\u3002\u5982\u679c\u4e0d\u4f20\u9012\u8be5\u7d22\u5f15\uff0c\u5373\u4f7f\u53ea\u6709\u4e00\u6761\u8bb0\u5f55\uff08\u5982\u6211\u4eec\u7684\u793a\u4f8b\u4e2d\uff09\uff0c\u4e5f\u5c06\u8fd4\u56de NULL \u7ed3\u679c\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @EmployeeAddress NVARCHAR(MAX) ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @EmployeeAddress = (<\/p>\n<p>SELECT<\/p>\n<p>1 AS &#8216;EmployeeID&#8217;<\/p>\n<p>, &#8216;5331 Rexford Court&#8217; AS &#8216;Address.Line1&#8217;<\/p>\n<p>, &#8216;Montgomery&#8217; \u00a0 \u00a0 \u00a0 \u00a0 AS &#8216;Address.City&#8217;<\/p>\n<p>, &#8216;AL&#8217; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AS &#8216;Address.State&#8217;<\/p>\n<p>, &#8216;36116&#8217; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0AS &#8216;Address.ZipCode&#8217;<\/p>\n<p>FOR JSON PATH, ROOT (&#8216;EmployeeAddress&#8217;)<\/p>\n<p>) ;<\/p>\n<p>&nbsp;<\/p>\n<p>UPDATE dbo.Employees<\/p>\n<p>SET Address = @EmployeeAddress<\/p>\n<p>WHERE EmployeeID =<\/p>\n<p>JSON_VALUE(@EmployeeAddress, &#8216;$.EmployeeAddress[0].EmployeeID&#8217;) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u5982\u679c\u6211\u4eec\u9700\u8981\u5c06\u8fd9\u4e2a JSON \u6587\u6863\u62c6\u5206\u6210\u5173\u7cfb\u578b\u683c\u5f0f\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 OPENJSON() \u51fd\u6570\u3002\u5bf9\u4e8e\u90a3\u4e9b\u5728\u672c\u7ae0\u524d\u9762\u9605\u8bfb\u8fc7 OPENXML() \u7684\u4eba\u6765\u8bf4\uff0cOPENJSON() \u7684\u683c\u5f0f\u548c\u529f\u80fd\u4f1a\u663e\u5f97\u5f88\u719f\u6089\u3002\u4e0d\u8fc7\uff0cOPENJSON() \u51fd\u6570\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u65e0\u9700\u5728\u4f7f\u7528\u524d\u51c6\u5907\u6587\u6863\u3002\u8fd9\u53ef\u4ee5\u8282\u7701\u8d44\u6e90\u4f7f\u7528\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u793a\u4f8b 3.24 \u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 OPENJSON() \u51fd\u6570\u6765\u89e3\u6790\u6211\u4eec\u7684\u5458\u5de5\u5730\u5740\u6587\u6863\u3002\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f JSON \u6587\u6863\u672c\u8eab\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u5b9a\u6211\u4eec\u5e0c\u671b\u67e5\u8be2\u7684\u5c42\u7ea7\u4e2d\u6700\u9ad8\u7ea7\u522b\u7684\u8def\u5f84\u3002\u8bf7\u8bb0\u4f4f\uff0c$ \u8868\u793a\u6574\u4e2a\u6587\u6863\uff0c\u5c31\u50cf\u6211\u4eec\u4f7f\u7528 JSON_VALUE() \u65f6\u4e00\u6837\uff0c\u6211\u4eec\u4f20\u9012\u7684\u8def\u5f84\u9700\u8981\u8003\u8651\u6570\u7ec4\uff0c\u901a\u8fc7\u6307\u5b9a\u6570\u7ec4\u7d22\u5f15\u6765\u5904\u7406\u3002WITH \u5b50\u53e5\u6307\u5b9a\u6211\u4eec\u5e0c\u671b\u4ece\u6587\u6863\u4e2d\u8fd4\u56de\u7684\u5217\uff0c\u4ee5\u53ca\u5b83\u4eec\u5c06\u6620\u5c04\u5230\u7684 SQL \u6570\u636e\u7c7b\u578b\u548c\u76f8\u5173\u8282\u70b9\u7684\u8def\u5f84\uff0c\u5f53\u8282\u70b9\u4e0d\u5728\u4e0e\u8def\u5f84\u8868\u8fbe\u5f0f\u76f8\u540c\u7684\u7ea7\u522b\u65f6\u4e5f\u9002\u7528\u3002<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>DECLARE @EmployeeAddress NVARCHAR(MAX) ;<\/p>\n<p>&nbsp;<\/p>\n<p>SET @EmployeeAddress = (<\/p>\n<p>SELECT<\/p>\n<p>1 AS &#8216;EmployeeID&#8217;<\/p>\n<p>, &#8216;5331 Rexford Court&#8217; AS &#8216;Address.Line1&#8217;<\/p>\n<p>, &#8216;Montgomery&#8217; \u00a0 \u00a0 \u00a0 \u00a0 AS &#8216;Address.City&#8217;<\/p>\n<p>, &#8216;AL&#8217; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AS &#8216;Address.State&#8217;<\/p>\n<p>, &#8216;36116&#8217; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0AS &#8216;Address.ZipCode&#8217;<\/p>\n<p>FOR JSON PATH, ROOT (&#8216;EmployeeAddress&#8217;)<\/p>\n<p>) ;<\/p>\n<p>&nbsp;<\/p>\n<p>SELECT *<\/p>\n<p>FROM OPENJSON(@EmployeeAddress, &#8216;$.EmployeeAddress[0]&#8217;)<\/p>\n<p>WITH (<\/p>\n<p>EmployeeID SMALLINT,<\/p>\n<p>Line1 NVARCHAR(64) &#8216;$.Address.Line1&#8217;,<\/p>\n<p>City NVARCHAR(64) &#8216;$.Address.City&#8217;,<\/p>\n<p>[State] NCHAR(2) &#8216;$.Address.State&#8217;,<\/p>\n<p>ZipCode NVARCHAR(10) &#8216;$.Address.ZipCode&#8217;<\/p>\n<p>) ;<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u5982\u679c\u4f7f\u7528\u5f97\u5f53\uff0cJSON \u5728 SQL Server \u4e2d\u53ef\u4ee5\u53d1\u6325\u91cd\u8981\u4f5c\u7528\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528 SQL Server \u7684 JSON \u652f\u6301\u6765\u53bb\u89c4\u8303\u5316\u6570\u636e\u5e76\u7b80\u5316\u590d\u6742\u7684\u6570\u636e\u6a21\u578b\uff0c\u96c6\u6210 NoSQL\uff0c\u6216\u8005\u907f\u514d\u5904\u7406\u4ece API \u53d1\u9001\u548c\u63a5\u6536\u7684\u6570\u636e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 18pt;\"><strong>\u603b\u7ed3<\/strong><\/span><\/p>\n<ul>\n<li><strong><span style=\"font-size: 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