{"id":192284,"date":"2024-11-12T18:28:25","date_gmt":"2024-11-12T10:28:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/192284\/"},"modified":"2024-11-12T18:28:26","modified_gmt":"2024-11-12T10:28:26","slug":"%e5%b0%8f%e6%8a%80%e5%b7%a7%e5%af%a6%e7%8f%besql-server%e7%94%9f%e6%88%90%e6%95%b8%e6%93%9a%e9%80%8f%e8%a6%96%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/192284\/","title":{"rendered":"\u5c0f\u6280\u5de7\u5be6\u73feSQL Server\u751f\u6210\u6578\u64da\u900f\u8996\u8868"},"content":{"rendered":"<h1 id=\"%e5%b0%8f%e6%8a%80%e5%b7%a7%e5%af%a6%e7%8f%besql-server%e7%94%9f%e6%88%90%e6%95%b8%e6%93%9a%e9%80%8f%e8%a6%96%e8%a1%a8-kdzUfAfUDs\">\u5c0f\u6280\u5de7\u5be6\u73feSQL Server\u751f\u6210\u6578\u64da\u900f\u8996\u8868<\/h1>\n<p>\u5728\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u4e2d\uff0c\u6578\u64da\u900f\u8996\u8868\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u7e3d\u7d50\u548c\u5206\u6790\u5927\u91cf\u6578\u64da\u3002SQL Server \u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u751f\u6210\u6578\u64da\u900f\u8996\u8868\uff0c\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u5c0f\u6280\u5de7\uff0c\u5e6b\u52a9\u60a8\u5728 SQL Server \u4e2d\u6709\u6548\u5730\u5275\u5efa\u6578\u64da\u900f\u8996\u8868\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e9%80%8f%e8%a6%96%e8%a1%a8%ef%bc%9f-kdzUfAfUDs\">\u4ec0\u9ebc\u662f\u6578\u64da\u900f\u8996\u8868\uff1f<\/h2>\n<p>\u6578\u64da\u900f\u8996\u8868\u662f\u4e00\u7a2e\u6578\u64da\u8655\u7406\u5de5\u5177\uff0c\u901a\u5e38\u7528\u65bc\u5f9e\u5927\u91cf\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u7528\u7684\u4fe1\u606f\u3002\u5b83\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u5730\u9032\u884c\u6578\u64da\u7684\u532f\u7e3d\u3001\u5206\u6790\u548c\u8996\u89ba\u5316\u3002\u900f\u8996\u8868\u7684\u4e3b\u8981\u529f\u80fd\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u532f\u7e3d\uff1a\u5c07\u6578\u64da\u6309\u7279\u5b9a\u7dad\u5ea6\u9032\u884c\u532f\u7e3d\u3002<\/li>\n<li>\u6578\u64da\u5206\u6790\uff1a\u901a\u904e\u4e0d\u540c\u7684\u8996\u89d2\u5206\u6790\u6578\u64da\u3002<\/li>\n<li>\u6578\u64da\u8996\u89ba\u5316\uff1a\u4ee5\u5716\u8868\u7684\u5f62\u5f0f\u5c55\u793a\u6578\u64da\uff0c\u4fbf\u65bc\u7406\u89e3\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-sql-server-%e7%94%9f%e6%88%90%e6%95%b8%e6%93%9a%e9%80%8f%e8%a6%96%e8%a1%a8-kdzUfAfUDs\">\u4f7f\u7528 SQL Server \u751f\u6210\u6578\u64da\u900f\u8996\u8868<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u751f\u6210\u6578\u64da\u900f\u8996\u8868\u7684\u5e38\u7528\u65b9\u6cd5\u662f\u4f7f\u7528 <code>PIVOT<\/code> \u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>PIVOT<\/code> \u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%ba%96%e5%82%99%e6%95%b8%e6%93%9a-kdzUfAfUDs\">1. \u6e96\u5099\u6578\u64da<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u6709\u4e00\u500b\u6578\u64da\u8868\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>Sales<\/code> \u7684\u8868\uff0c\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<pre>\nCREATE TABLE Sales (\n    Product NVARCHAR(50),\n    Year INT,\n    Amount DECIMAL(10, 2)\n);\n<\/pre>\n<p>\u4e26\u4e14\u6211\u5011\u5df2\u7d93\u63d2\u5165\u4e86\u4e00\u4e9b\u6578\u64da\uff1a<\/p>\n<pre>\nINSERT INTO Sales (Product, Year, Amount) VALUES\n('Product A', 2021, 100),\n('Product A', 2022, 150),\n('Product B', 2021, 200),\n('Product B', 2022, 250);\n<\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-pivot-%e7%94%9f%e6%88%90%e9%80%8f%e8%a6%96%e8%a1%a8-kdzUfAfUDs\">2. \u4f7f\u7528 PIVOT \u751f\u6210\u900f\u8996\u8868<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>PIVOT<\/code> \u4f86\u751f\u6210\u900f\u8996\u8868\uff0c\u5c07\u5e74\u4efd\u4f5c\u70ba\u5217\uff0c\u7522\u54c1\u4f5c\u70ba\u884c\uff0c\u92b7\u552e\u984d\u4f5c\u70ba\u503c\uff1a<\/p>\n<pre>\nSELECT *\nFROM (\n    SELECT Product, Year, Amount\n    FROM Sales\n) AS SourceTable\nPIVOT (\n    SUM(Amount)\n    FOR Year IN ([2021], [2022])\n) AS PivotTable;\n<\/pre>\n<p>\u9019\u6bb5 SQL \u8a9e\u53e5\u5c07\u751f\u6210\u4e00\u500b\u900f\u8996\u8868\uff0c\u986f\u793a\u6bcf\u500b\u7522\u54c1\u5728\u4e0d\u540c\u5e74\u4efd\u7684\u92b7\u552e\u984d\u3002<\/p>\n<h3 id=\"3-%e8%99%95%e7%90%86%e5%8b%95%e6%85%8b%e5%88%97-kdzUfAfUDs\">3. \u8655\u7406\u52d5\u614b\u5217<\/h3>\n<p>\u5982\u679c\u60a8\u5e0c\u671b\u900f\u8996\u8868\u7684\u5217\u662f\u52d5\u614b\u7684\uff0c\u5373\u6839\u64da\u6578\u64da\u81ea\u52d5\u751f\u6210\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u52d5\u614b SQL\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre>\nDECLARE @cols AS NVARCHAR(MAX),\n        @query  AS NVARCHAR(MAX);\n\nSELECT @cols = STRING_AGG(QUOTENAME(Year), ', ')\nFROM (SELECT DISTINCT Year FROM Sales) AS Years;\n\nSET @query = 'SELECT Product, ' + @cols + '\n              FROM (\n                  SELECT Product, Year, Amount\n                  FROM Sales\n              ) AS SourceTable\n              PIVOT (\n                  SUM(Amount)\n                  FOR Year IN (' + @cols + ')\n              ) AS PivotTable;';\n\nEXEC sp_executesql @query;\n<\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u9996\u5148\u7372\u53d6\u6240\u6709\u5e74\u4efd\uff0c\u7136\u5f8c\u751f\u6210\u4e00\u500b\u52d5\u614b\u7684\u900f\u8996\u8868\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-kdzUfAfUDs\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u4f7f\u7528 SQL Server \u7684 <code>PIVOT<\/code> \u64cd\u4f5c\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u751f\u6210\u6578\u64da\u900f\u8996\u8868\uff0c\u5f9e\u800c\u66f4\u597d\u5730\u5206\u6790\u548c\u7406\u89e3\u6578\u64da\u3002\u7121\u8ad6\u662f\u975c\u614b\u9084\u662f\u52d5\u614b\u7684\u900f\u8996\u8868\uff0c\u9019\u4e9b\u6280\u5de7\u90fd\u80fd\u5e6b\u52a9\u60a8\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u548c\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u5206\u6790\u63d0\u4f9b\u66f4\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5c0f\u6280\u5de7\uff0c\u8f15\u9b06\u5728SQL Server\u4e2d\u751f\u6210\u6578\u64da\u900f\u8996\u8868\uff0c\u63d0\u5347\u6578\u64da\u5206\u6790\u6548\u7387\uff0c\u5feb\u901f\u7372\u53d6\u95dc\u9375\u6d1e\u5bdf\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-192284","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/192284","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=192284"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/192284\/revisions"}],"predecessor-version":[{"id":192285,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/192284\/revisions\/192285"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=192284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=192284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=192284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}