{"id":139061,"date":"2024-10-31T17:55:25","date_gmt":"2024-10-31T09:55:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/139061\/"},"modified":"2024-10-31T17:55:26","modified_gmt":"2024-10-31T09:55:26","slug":"sql-server%e5%af%a6%e7%8f%be%e5%be%aa%e7%92%b0%e7%b7%a8%e7%a8%8b%ef%bc%9a%e5%be%9e%e6%8a%80%e8%a1%93%e5%88%b0%e5%af%a6%e8%b8%90%ef%bc%88sqlserver%e5%af%ab%e5%be%aa%e7%92%b0%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/139061\/","title":{"rendered":"SQL Server\u5be6\u73fe\u5faa\u74b0\u7de8\u7a0b\uff1a\u5f9e\u6280\u8853\u5230\u5be6\u8e10\uff08sqlserver\u5beb\u5faa\u74b0\uff09"},"content":{"rendered":"<h1 id=\"sql-server%e5%af%a6%e7%8f%be%e5%be%aa%e7%92%b0%e7%b7%a8%e7%a8%8b%ef%bc%9a%e5%be%9e%e6%8a%80%e8%a1%93%e5%88%b0%e5%af%a6%e8%b8%90-XPVtObkDbN\">SQL Server\u5be6\u73fe\u5faa\u74b0\u7de8\u7a0b\uff1a\u5f9e\u6280\u8853\u5230\u5be6\u8e10<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5faa\u74b0\u7de8\u7a0b\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002SQL Server\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u5faa\u74b0\u7de8\u7a0b\u3002\u672c\u6587\u5c07\u63a2\u8a0eSQL Server\u4e2d\u7684\u5faa\u74b0\u7de8\u7a0b\u6280\u8853\uff0c\u4e26\u63d0\u4f9b\u5be6\u969b\u7684\u61c9\u7528\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e5%be%aa%e7%92%b0%e7%b7%a8%e7%a8%8b%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-XPVtObkDbN\">\u5faa\u74b0\u7de8\u7a0b\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5faa\u74b0\u7de8\u7a0b\u662f\u6307\u5728\u7a0b\u5e8f\u4e2d\u91cd\u8907\u57f7\u884c\u67d0\u6bb5\u4ee3\u78bc\u7684\u904e\u7a0b\u3002\u9019\u5728\u9700\u8981\u5c0d\u591a\u689d\u8a18\u9304\u9032\u884c\u76f8\u540c\u64cd\u4f5c\u6642\u7279\u5225\u6709\u7528\u3002\u5728SQL Server\u4e2d\uff0c\u5e38\u898b\u7684\u5faa\u74b0\u7d50\u69cb\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>WHILE\u5faa\u74b0<\/strong><\/li>\n<li><strong>CURSOR<\/strong><\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8while%e5%be%aa%e7%92%b0-XPVtObkDbN\">\u4f7f\u7528WHILE\u5faa\u74b0<\/h2>\n<p>WHILE\u5faa\u74b0\u662f\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u5faa\u74b0\u7d50\u69cb\u3002\u5b83\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>\nWHILE (\u689d\u4ef6)\nBEGIN\n    -- \u57f7\u884c\u7684SQL\u8a9e\u53e5\nEND\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528WHILE\u5faa\u74b0\u7684\u793a\u4f8b\uff0c\u8a72\u793a\u4f8b\u5c07\u5f9e1\u52a0\u523010\uff1a<\/p>\n<pre><code>\nDECLARE @Counter INT = 1;\nDECLARE @Sum INT = 0;\n\nWHILE @Counter &lt;= 10\nBEGIN\n    SET @Sum = @Sum + @Counter;\n    SET @Counter = @Counter + 1;\nEND\n\nSELECT @Sum AS TotalSum;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86\u5169\u500b\u8b8a\u91cf\uff1a@Counter\u548c@Sum\u3002WHILE\u5faa\u74b0\u5c07\u6301\u7e8c\u57f7\u884c\uff0c\u76f4\u5230@Counter\u7684\u503c\u5927\u65bc10\uff0c\u6700\u7d42\u8a08\u7b97\u51fa1\u523010\u7684\u7e3d\u548c\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8cursor-XPVtObkDbN\">\u4f7f\u7528CURSOR<\/h2>\n<p>CURSOR\u662f\u4e00\u7a2e\u66f4\u70ba\u9748\u6d3b\u7684\u5faa\u74b0\u7d50\u69cb\uff0c\u9069\u5408\u65bc\u9700\u8981\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\u7684\u60c5\u6cc1\u3002CURSOR\u7684\u57fa\u672c\u4f7f\u7528\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u8072\u660eCURSOR<\/li>\n<li>\u6253\u958bCURSOR<\/li>\n<li>\u63d0\u53d6\u6578\u64da<\/li>\n<li>\u8655\u7406\u6578\u64da<\/li>\n<li>\u95dc\u9589\u548c\u91cb\u653eCURSOR<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528CURSOR\u7684\u793a\u4f8b\uff0c\u8a72\u793a\u4f8b\u5c07\u904d\u6b77\u4e00\u500b\u540d\u70baEmployees\u7684\u8868\uff0c\u4e26\u6253\u5370\u6bcf\u4f4d\u54e1\u5de5\u7684\u59d3\u540d\uff1a<\/p>\n<pre><code>\nDECLARE @EmployeeName NVARCHAR(100);\n\nDECLARE EmployeeCursor CURSOR FOR\nSELECT Name FROM Employees;\n\nOPEN EmployeeCursor;\n\nFETCH NEXT FROM EmployeeCursor INTO @EmployeeName;\n\nWHILE @@FETCH_STATUS = 0\nBEGIN\n    PRINT @EmployeeName;\n    FETCH NEXT FROM EmployeeCursor INTO @EmployeeName;\nEND\n\nCLOSE EmployeeCursor;\nDEALLOCATE EmployeeCursor;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u8072\u660e\u4e86\u4e00\u500bCURSOR\uff0c\u7136\u5f8c\u6253\u958b\u5b83\u4ee5\u4fbf\u5f9eEmployees\u8868\u4e2d\u63d0\u53d6\u6578\u64da\u3002\u63a5\u8457\uff0c\u6211\u5011\u4f7f\u7528WHILE\u5faa\u74b0\u4f86\u9010\u884c\u8655\u7406\u6bcf\u4f4d\u54e1\u5de5\u7684\u59d3\u540d\uff0c\u4e26\u5728\u63a7\u5236\u53f0\u4e0a\u6253\u5370\u51fa\u4f86\u3002\u6700\u5f8c\uff0c\u6211\u5011\u95dc\u9589\u4e26\u91cb\u653eCURSOR\u4ee5\u91cb\u653e\u8cc7\u6e90\u3002<\/p>\n<h2 id=\"%e5%be%aa%e7%92%b0%e7%b7%a8%e7%a8%8b%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-XPVtObkDbN\">\u5faa\u74b0\u7de8\u7a0b\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u5faa\u74b0\u7de8\u7a0b\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u6027\u80fd\uff1a\u904e\u591a\u7684\u5faa\u74b0\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<li>\u8cc7\u6e90\u7ba1\u7406\uff1a\u78ba\u4fdd\u5728\u4f7f\u7528CURSOR\u5f8c\u6b63\u78ba\u95dc\u9589\u548c\u91cb\u653e\u8cc7\u6e90\uff0c\u4ee5\u907f\u514d\u5167\u5b58\u6cc4\u6f0f\u3002<\/li>\n<li>\u932f\u8aa4\u8655\u7406\uff1a\u5728\u5faa\u74b0\u4e2d\u6dfb\u52a0\u932f\u8aa4\u8655\u7406\u908f\u8f2f\uff0c\u4ee5\u78ba\u4fdd\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-XPVtObkDbN\">\u7e3d\u7d50<\/h2>\n<p>SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u5faa\u74b0\u7de8\u7a0b\uff0c\u5305\u62ecWHILE\u5faa\u74b0\u548cCURSOR\u3002\u9019\u4e9b\u6280\u8853\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u975e\u5e38\u6709\u7528\uff0c\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002\u7136\u800c\uff0c\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u6027\u80fd\u548c\u8cc7\u6e90\u7ba1\u7406\u7b49\u554f\u984c\uff0c\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u904b\u884c\u3002\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684SQL Server\u61c9\u7528\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u958b\u767c\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u914d\u7f6e\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u4e2d\u5faa\u74b0\u7de8\u7a0b\u7684\u6280\u8853\u8207\u5be6\u8e10\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528SQL\u8a9e\u53e5\u5be6\u73fe\u5faa\u74b0\u64cd\u4f5c\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-139061","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/139061","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=139061"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/139061\/revisions"}],"predecessor-version":[{"id":139062,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/139061\/revisions\/139062"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=139061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=139061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=139061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}