{"id":138401,"date":"2024-10-31T14:10:23","date_gmt":"2024-10-31T06:10:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138401\/"},"modified":"2024-10-31T14:10:23","modified_gmt":"2024-10-31T06:10:23","slug":"sql-server%e8%a1%a8%e8%ae%8a%e9%87%8f%e8%88%87%e6%9f%a5%e8%a9%a2%e5%88%97%e8%bd%89%e8%a1%8c%e9%a1%af%e7%a4%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138401\/","title":{"rendered":"SQL Server\u8868\u8b8a\u91cf\u8207\u67e5\u8a62\u5217\u8f49\u884c\u986f\u793a"},"content":{"rendered":"<h1 id=\"sql-server%e8%a1%a8%e8%ae%8a%e9%87%8f%e8%88%87%e6%9f%a5%e8%a9%a2%e5%88%97%e8%bd%89%e8%a1%8c%e9%a1%af%e7%a4%ba-ATooehBmve\">SQL Server\u8868\u8b8a\u91cf\u8207\u67e5\u8a62\u5217\u8f49\u884c\u986f\u793a<\/h1>\n<p>\u5728SQL Server\u4e2d\uff0c\u8868\u8b8a\u91cf\u662f\u4e00\u7a2e\u7528\u65bc\u5b58\u5132\u81e8\u6642\u6578\u64da\u7684\u6578\u64da\u7d50\u69cb\u3002\u5b83\u5011\u7684\u4f7f\u7528\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u591a\u6b21\u8a2a\u554f\u76f8\u540c\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u8868\u8b8a\u91cf\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u5176\u5728\u67e5\u8a62\u5217\u8f49\u884c\u986f\u793a\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%a1%a8%e8%ae%8a%e9%87%8f%ef%bc%9f-ATooehBmve\">\u4ec0\u9ebc\u662f\u8868\u8b8a\u91cf\uff1f<\/h2>\n<p>\u8868\u8b8a\u91cf\u662f\u4e00\u7a2e\u7279\u6b8a\u985e\u578b\u7684\u8b8a\u91cf\uff0c\u7528\u65bc\u5b58\u5132\u8868\u683c\u6578\u64da\u3002\u5b83\u5011\u7684\u5b9a\u7fa9\u985e\u4f3c\u65bc\u5e38\u898f\u8868\uff0c\u4f46\u5176\u4f5c\u7528\u7bc4\u570d\u50c5\u9650\u65bc\u7576\u524d\u7684\u6279\u8655\u7406\u3001\u5b58\u5132\u904e\u7a0b\u6216\u51fd\u6578\u3002\u8868\u8b8a\u91cf\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DECLARE @TableVariable TABLE (\n    Column1 DataType,\n    Column2 DataType,\n    ...\n);<\/code><\/pre>\n<p>\u8868\u8b8a\u91cf\u7684\u4e3b\u8981\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4f5c\u7528\u7bc4\u570d\u6709\u9650\uff1a\u8868\u8b8a\u91cf\u7684\u751f\u547d\u9031\u671f\u50c5\u9650\u65bc\u5176\u88ab\u5b9a\u7fa9\u7684\u7bc4\u570d\u3002<\/li>\n<li>\u6027\u80fd\u512a\u52e2\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u8868\u8b8a\u91cf\u7684\u6027\u80fd\u512a\u65bc\u81e8\u6642\u8868\uff0c\u7279\u5225\u662f\u5728\u5c0f\u578b\u6578\u64da\u96c6\u4e0a\u3002<\/li>\n<li>\u4e0d\u652f\u6301\u7d22\u5f15\uff1a\u8868\u8b8a\u91cf\u4e0d\u652f\u6301\u5275\u5efa\u7d22\u5f15\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528\u4e3b\u9375\u7d04\u675f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e5%88%97%e8%bd%89%e8%a1%8c%e9%a1%af%e7%a4%ba%e7%9a%84%e6%a6%82%e5%bf%b5-ATooehBmve\">\u67e5\u8a62\u5217\u8f49\u884c\u986f\u793a\u7684\u6982\u5ff5<\/h2>\n<p>\u67e5\u8a62\u5217\u8f49\u884c\u986f\u793a\uff08\u4e5f\u7a31\u70ba\u201c\u884c\u5217\u8f49\u63db\u201d\uff09\u662f\u4e00\u7a2e\u5c07\u6578\u64da\u5f9e\u5217\u683c\u5f0f\u8f49\u63db\u70ba\u884c\u683c\u5f0f\u7684\u6280\u8853\u3002\u9019\u5728\u5831\u544a\u548c\u6578\u64da\u5206\u6790\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u4f7f\u6578\u64da\u66f4\u5177\u53ef\u8b80\u6027\u548c\u53ef\u7406\u89e3\u6027\u3002<\/p>\n<p>\u5728SQL Server\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528PIVOT\u548cUNPIVOT\u64cd\u4f5c\u4f86\u5be6\u73fe\u5217\u8f49\u884c\u986f\u793a\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528UNPIVOT\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>SELECT Column1, Column2\nFROM YourTable\nUNPIVOT (\n    Value FOR ColumnName IN (ColumnA, ColumnB, ColumnC)\n) AS UnpivotedTable;<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%a1%a8%e8%ae%8a%e9%87%8f%e9%80%b2%e8%a1%8c%e8%a1%8c%e5%88%97%e8%bd%89%e6%8f%9b%e7%9a%84%e7%a4%ba%e4%be%8b-ATooehBmve\">\u4f7f\u7528\u8868\u8b8a\u91cf\u9032\u884c\u884c\u5217\u8f49\u63db\u7684\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5305\u542b\u92b7\u552e\u6578\u64da\u7684\u8868\uff0c\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE Sales (\n    ProductName NVARCHAR(50),\n    Q1 INT,\n    Q2 INT,\n    Q3 INT,\n    Q4 INT\n);<\/code><\/pre>\n<p>\u6211\u5011\u5e0c\u671b\u5c07\u9019\u4e9b\u6578\u64da\u8f49\u63db\u70ba\u884c\u683c\u5f0f\uff0c\u4ee5\u4fbf\u66f4\u5bb9\u6613\u9032\u884c\u5206\u6790\u3002\u9996\u5148\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u8868\u8b8a\u91cf\u4f86\u5b58\u5132\u4e2d\u9593\u7d50\u679c\uff1a<\/p>\n<pre><code>DECLARE @SalesData TABLE (\n    ProductName NVARCHAR(50),\n    Quarter NVARCHAR(2),\n    SalesAmount INT\n);\n\nINSERT INTO @SalesData (ProductName, Quarter, SalesAmount)\nSELECT ProductName, 'Q1', Q1 FROM Sales\nUNION ALL\nSELECT ProductName, 'Q2', Q2 FROM Sales\nUNION ALL\nSELECT ProductName, 'Q3', Q3 FROM Sales\nUNION ALL\nSELECT ProductName, 'Q4', Q4 FROM Sales;<\/code><\/pre>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u53ef\u4ee5\u67e5\u8a62\u9019\u500b\u8868\u8b8a\u91cf\uff0c\u7372\u5f97\u8f49\u63db\u5f8c\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM @SalesData;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ATooehBmve\">\u7e3d\u7d50<\/h2>\n<p>\u8868\u8b8a\u91cf\u5728SQL Server\u4e2d\u662f\u4e00\u7a2e\u9748\u6d3b\u4e14\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u65b9\u5f0f\uff0c\u7279\u5225\u9069\u5408\u7528\u65bc\u81e8\u6642\u6578\u64da\u7684\u8655\u7406\u3002\u901a\u904e\u4f7f\u7528\u8868\u8b8a\u91cf\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u9032\u884c\u884c\u5217\u8f49\u63db\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u8b80\u6027\u548c\u53ef\u5206\u6790\u6027\u3002\u9019\u4e9b\u6280\u8853\u5c0d\u65bc\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u751f\u6210\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u548c\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684SQL Server\u61c9\u7528\u7a0b\u5e8f\uff0c\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u9748\u6d3b\u7684\u8cc7\u6e90\u914d\u7f6e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u4e2d\u8868\u8b8a\u91cf\u7684\u4f7f\u7528\u53ca\u67e5\u8a62\u5217\u8f49\u884c\u986f\u793a\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\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-138401","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138401","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=138401"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138401\/revisions"}],"predecessor-version":[{"id":138402,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138401\/revisions\/138402"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}