{"id":143849,"date":"2024-11-01T01:46:22","date_gmt":"2024-10-31T17:46:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143849\/"},"modified":"2024-11-01T01:46:23","modified_gmt":"2024-10-31T17:46:23","slug":"sql-%e7%b6%93%e5%85%b8%ef%bc%9at-sql-%e4%b8%ad%e7%9a%84%e9%80%8f%e8%a6%96%e5%92%8c%e9%80%86%e9%80%8f%e8%a6%96%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143849\/","title":{"rendered":"SQL \u7d93\u5178\uff1aT-SQL \u4e2d\u7684\u900f\u8996\u548c\u9006\u900f\u8996\u89e3\u6790"},"content":{"rendered":"<h1 id=\"sql-%e7%b6%93%e5%85%b8%ef%bc%9at-sql-%e4%b8%ad%e7%9a%84%e9%80%8f%e8%a6%96%e5%92%8c%e9%80%86%e9%80%8f%e8%a6%96%e8%a7%a3%e6%9e%90-VXFIioYNpm\">SQL \u7d93\u5178\uff1aT-SQL \u4e2d\u7684\u900f\u8996\u548c\u9006\u900f\u8996\u89e3\u6790<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002\u7279\u5225\u662f\u5728 Microsoft SQL Server \u4e2d\uff0cT-SQL\uff08Transact-SQL\uff09\u63d0\u4f9b\u4e86\u8a31\u591a\u5f37\u5927\u7684\u529f\u80fd\u4f86\u8655\u7406\u6578\u64da\u3002\u900f\u8996\uff08PIVOT\uff09\u548c\u9006\u900f\u8996\uff08UNPIVOT\uff09\u662f T-SQL \u4e2d\u5169\u500b\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u4ee5\u4e0d\u540c\u7684\u65b9\u5f0f\u67e5\u770b\u548c\u5206\u6790\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u5169\u500b\u64cd\u4f5c\u7684\u6982\u5ff5\u3001\u7528\u6cd5\u53ca\u5176\u5be6\u969b\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e9%80%8f%e8%a6%96%ef%bc%88pivot%ef%bc%89-VXFIioYNpm\">\u900f\u8996\uff08PIVOT\uff09<\/h2>\n<p>\u900f\u8996\u64cd\u4f5c\u7684\u4e3b\u8981\u76ee\u7684\u662f\u5c07\u884c\u6578\u64da\u8f49\u63db\u70ba\u5217\u6578\u64da\uff0c\u9019\u6a23\u53ef\u4ee5\u66f4\u76f4\u89c0\u5730\u5c55\u793a\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u92b7\u552e\u6578\u64da\u8868\uff0c\u8a18\u9304\u4e86\u4e0d\u540c\u7522\u54c1\u5728\u4e0d\u540c\u6708\u4efd\u7684\u92b7\u552e\u984d\u3002\u900f\u8996\u64cd\u4f5c\u53ef\u4ee5\u5c07\u6bcf\u500b\u7522\u54c1\u7684\u92b7\u552e\u984d\u986f\u793a\u70ba\u5217\uff0c\u6708\u4efd\u5247\u4f5c\u70ba\u884c\u3002<\/p>\n<h3 id=\"%e9%80%8f%e8%a6%96%e7%9a%84%e8%aa%9e%e6%b3%95-VXFIioYNpm\">\u900f\u8996\u7684\u8a9e\u6cd5<\/h3>\n<pre><code>\nSELECT , , ..., , , ...\nFROM \n(\n    SELECT \n    FROM \n) AS SourceTable\nPIVOT\n(\n    SUM()\n    FOR  IN (, , ...)\n) AS PivotTable;\n<\/code><\/pre>\n<h3 id=\"%e9%80%8f%e8%a6%96%e7%9a%84%e7%af%84%e4%be%8b-VXFIioYNpm\">\u900f\u8996\u7684\u7bc4\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4ee5\u4e0b\u7684\u92b7\u552e\u6578\u64da\u8868\uff1a<\/p>\n<pre><code>\nCREATE TABLE SalesData (\n    Product NVARCHAR(50),\n    Month NVARCHAR(20),\n    Amount INT\n);\n\nINSERT INTO SalesData (Product, Month, Amount) VALUES\n('Product A', 'January', 100),\n('Product A', 'February', 150),\n('Product B', 'January', 200),\n('Product B', 'February', 250);\n<\/code><\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u900f\u8996\u64cd\u4f5c\u4f86\u5c07\u9019\u4e9b\u6578\u64da\u8f49\u63db\u70ba\u66f4\u6613\u65bc\u7406\u89e3\u7684\u683c\u5f0f\uff1a<\/p>\n<pre><code>\nSELECT *\nFROM \n(\n    SELECT Product, Month, Amount\n    FROM SalesData\n) AS SourceTable\nPIVOT\n(\n    SUM(Amount)\n    FOR Month IN ([January], [February])\n) AS PivotTable;\n<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u6211\u5011\u5c07\u5f97\u5230\u4e00\u500b\u65b0\u7684\u8868\u683c\uff0c\u5176\u4e2d\u6bcf\u500b\u7522\u54c1\u7684\u92b7\u552e\u984d\u5728\u4e0d\u540c\u6708\u4efd\u7684\u6578\u64da\u5c07\u986f\u793a\u70ba\u5217\u3002<\/p>\n<h2 id=\"%e9%80%86%e9%80%8f%e8%a6%96%ef%bc%88unpivot%ef%bc%89-VXFIioYNpm\">\u9006\u900f\u8996\uff08UNPIVOT\uff09<\/h2>\n<p>\u9006\u900f\u8996\u64cd\u4f5c\u5247\u662f\u5c07\u5217\u6578\u64da\u8f49\u63db\u70ba\u884c\u6578\u64da\uff0c\u9019\u5728\u9700\u8981\u5c07\u5bec\u8868\u8f49\u63db\u70ba\u9577\u8868\u6642\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u7576\u6211\u5011\u9700\u8981\u5c07\u900f\u8996\u5f8c\u7684\u6578\u64da\u518d\u6b21\u8f49\u63db\u56de\u539f\u59cb\u683c\u5f0f\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u9006\u900f\u8996\u3002<\/p>\n<h3 id=\"%e9%80%86%e9%80%8f%e8%a6%96%e7%9a%84%e8%aa%9e%e6%b3%95-VXFIioYNpm\">\u9006\u900f\u8996\u7684\u8a9e\u6cd5<\/h3>\n<pre><code>\nSELECT , , \nFROM \nUNPIVOT\n(\n     FOR  IN (, , ...)\n) AS UnpivotTable;\n<\/code><\/pre>\n<h3 id=\"%e9%80%86%e9%80%8f%e8%a6%96%e7%9a%84%e7%af%84%e4%be%8b-VXFIioYNpm\">\u9006\u900f\u8996\u7684\u7bc4\u4f8b<\/h3>\n<p>\u57fa\u65bc\u4e4b\u524d\u7684\u900f\u8996\u7d50\u679c\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u9006\u900f\u8996\u4f86\u5c07\u6578\u64da\u8f49\u63db\u56de\u539f\u59cb\u683c\u5f0f\uff1a<\/p>\n<pre><code>\nSELECT Product, Month, Amount\nFROM \n(\n    SELECT Product, [January], [February]\n    FROM PivotTable\n) AS SourceTable\nUNPIVOT\n(\n    Amount FOR Month IN ([January], [February])\n) AS UnpivotTable;\n<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u5c07\u900f\u8996\u5f8c\u7684\u6578\u64da\u6062\u5fa9\u70ba\u539f\u59cb\u7684\u884c\u683c\u5f0f\uff0c\u4fbf\u65bc\u9032\u4e00\u6b65\u7684\u6578\u64da\u5206\u6790\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-VXFIioYNpm\">\u7d50\u8ad6<\/h2>\n<p>\u900f\u8996\u548c\u9006\u900f\u8996\u662f T-SQL \u4e2d\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u4ee5\u4e0d\u540c\u7684\u65b9\u5f0f\u67e5\u770b\u548c\u5206\u6790\u6578\u64da\u3002\u900f\u8996\u64cd\u4f5c\u4f7f\u5f97\u6578\u64da\u7684\u5c55\u793a\u66f4\u52a0\u76f4\u89c0\uff0c\u800c\u9006\u900f\u8996\u5247\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\uff0c\u8b93\u7528\u6236\u80fd\u5920\u96a8\u6642\u5c07\u6578\u64da\u8f49\u63db\u56de\u539f\u59cb\u683c\u5f0f\u3002\u638c\u63e1\u9019\u4e9b\u64cd\u4f5c\u5c0d\u65bc\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u751f\u6210\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c SQL \u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u9ad8\u6548\u7a69\u5b9a\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 T-SQL \u4e2d\u7684\u900f\u8996\u548c\u9006\u900f\u8996\u6280\u8853\uff0c\u6df1\u5165\u89e3\u6790\u6578\u64da\u8f49\u63db\u8207\u5206\u6790\u7684\u7d93\u5178\u65b9\u6cd5\uff0c\u63d0\u5347 SQL \u6548\u7387\u8207\u9748\u6d3b\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-143849","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=143849"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143849\/revisions"}],"predecessor-version":[{"id":143850,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143849\/revisions\/143850"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}