{"id":168821,"date":"2024-11-06T16:30:28","date_gmt":"2024-11-06T08:30:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168821\/"},"modified":"2024-11-06T16:30:28","modified_gmt":"2024-11-06T08:30:28","slug":"t-sql-%e6%9f%a5%e8%a9%a2%e9%80%b2%e9%9a%8e-%e6%b5%81%e7%a8%8b%e6%8e%a7%e5%88%b6%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168821\/","title":{"rendered":"T-SQL \u67e5\u8a62\u9032\u968e&#8211;\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5"},"content":{"rendered":"<h1 id=\"t-sql-%e6%9f%a5%e8%a9%a2%e9%80%b2%e9%9a%8e-%e6%b5%81%e7%a8%8b%e6%8e%a7%e5%88%b6%e8%aa%9e%e5%8f%a5-KpZSSjjTca\">T-SQL \u67e5\u8a62\u9032\u968e&#8211;\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cT-SQL\uff08Transact-SQL\uff09\u662f Microsoft SQL Server \u7684\u64f4\u5c55 SQL \u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u8a31\u591a\u5f37\u5927\u7684\u529f\u80fd\u4f86\u9032\u884c\u8cc7\u6599\u67e5\u8a62\u548c\u64cd\u4f5c\u3002\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\u662f T-SQL \u4e2d\u4e00\u500b\u91cd\u8981\u7684\u7d44\u6210\u90e8\u5206\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u63a7\u5236\u7a0b\u5f0f\u7684\u57f7\u884c\u6d41\u7a0b\uff0c\u5be6\u73fe\u66f4\u8907\u96dc\u7684\u908f\u8f2f\u904b\u7b97\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e T-SQL \u4e2d\u7684\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\uff0c\u5305\u62ec\u5176\u985e\u578b\u3001\u7528\u6cd5\u53ca\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"%e6%b5%81%e7%a8%8b%e6%8e%a7%e5%88%b6%e8%aa%9e%e5%8f%a5%e7%9a%84%e9%a1%9e%e5%9e%8b-KpZSSjjTca\">\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\u7684\u985e\u578b<\/h2>\n<p>T-SQL \u7684\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\u4e3b\u8981\u53ef\u4ee5\u5206\u70ba\u4ee5\u4e0b\u5e7e\u985e\uff1a<\/p>\n<ul>\n<li><strong id=\"%e6%a2%9d%e4%bb%b6%e8%aa%9e%e5%8f%a5-KpZSSjjTca\">\u689d\u4ef6\u8a9e\u53e5<\/strong>\uff1a\u5982 <code>IF...ELSE<\/code> \u8a9e\u53e5\uff0c\u7528\u65bc\u6839\u64da\u689d\u4ef6\u57f7\u884c\u4e0d\u540c\u7684\u7a0b\u5f0f\u78bc\u584a\u3002<\/li>\n<li><strong id=\"%e8%bf%b4%e5%9c%88%e8%aa%9e%e5%8f%a5-KpZSSjjTca\">\u8ff4\u5708\u8a9e\u53e5<\/strong>\uff1a\u5982 <code>WHILE<\/code> \u8ff4\u5708\uff0c\u5141\u8a31\u91cd\u8907\u57f7\u884c\u4e00\u6bb5\u7a0b\u5f0f\u78bc\uff0c\u76f4\u5230\u6eff\u8db3\u7279\u5b9a\u689d\u4ef6\u3002<\/li>\n<li><strong id=\"%e9%8c%af%e8%aa%a4%e8%99%95%e7%90%86-KpZSSjjTca\">\u932f\u8aa4\u8655\u7406<\/strong>\uff1a\u5982 <code>TRY...CATCH<\/code> \u7d50\u69cb\uff0c\u7528\u65bc\u6355\u6349\u548c\u8655\u7406\u57f7\u884c\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\u3002<\/li>\n<li><strong id=\"%e8%ae%8a%e6%95%b8%e5%ae%a3%e5%91%8a%e8%88%87%e8%b3%a6%e5%80%bc-KpZSSjjTca\">\u8b8a\u6578\u5ba3\u544a\u8207\u8ce6\u503c<\/strong>\uff1a\u4f7f\u7528 <code>DECLARE<\/code> \u548c <code>SET<\/code> \u8a9e\u53e5\u4f86\u5ba3\u544a\u548c\u8ce6\u503c\u8b8a\u6578\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%a2%9d%e4%bb%b6%e8%aa%9e%e5%8f%a5-KpZSSjjTca\">\u689d\u4ef6\u8a9e\u53e5<\/h2>\n<p>\u689d\u4ef6\u8a9e\u53e5\u662f T-SQL \u4e2d\u6700\u5e38\u7528\u7684\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\u4e4b\u4e00\u3002\u5b83\u5141\u8a31\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u57f7\u884c\u4e0d\u540c\u7684\u7a0b\u5f0f\u78bc\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>\nDECLARE @Score INT\nSET @Score = 85\n\nIF @Score &gt;= 60\n    PRINT '\u53ca\u683c'\nELSE\n    PRINT '\u4e0d\u53ca\u683c'\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6839\u64da\u8b8a\u6578 <code>@Score<\/code> \u7684\u503c\uff0c\u7a0b\u5f0f\u6703\u8f38\u51fa\u300c\u53ca\u683c\u300d\u6216\u300c\u4e0d\u53ca\u683c\u300d\u3002<\/p>\n<h2 id=\"%e8%bf%b4%e5%9c%88%e8%aa%9e%e5%8f%a5-KpZSSjjTca\">\u8ff4\u5708\u8a9e\u53e5<\/h2>\n<p>\u8ff4\u5708\u8a9e\u53e5\u5141\u8a31\u91cd\u8907\u57f7\u884c\u4e00\u6bb5\u7a0b\u5f0f\u78bc\uff0c\u76f4\u5230\u6eff\u8db3\u7279\u5b9a\u689d\u4ef6\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>WHILE<\/code> \u8ff4\u5708\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>\nDECLARE @Counter INT\nSET @Counter = 1\n\nWHILE @Counter &lt;= 5\nBEGIN\n    PRINT &#039;\u8a08\u6578\uff1a&#039; + CAST(@Counter AS VARCHAR)\n    SET @Counter = @Counter + 1\nEND\n<\/code><\/pre>\n<p>\u9019\u6bb5\u7a0b\u5f0f\u78bc\u6703\u8f38\u51fa\u8a08\u6578\u5f9e 1 \u5230 5 \u7684\u6578\u5b57\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e8%99%95%e7%90%86-KpZSSjjTca\">\u932f\u8aa4\u8655\u7406<\/h2>\n<p>\u5728 T-SQL \u4e2d\uff0c\u932f\u8aa4\u8655\u7406\u662f\u78ba\u4fdd\u7a0b\u5f0f\u7a69\u5b9a\u6027\u7684\u91cd\u8981\u90e8\u5206\u3002\u4f7f\u7528 <code>TRY...CATCH<\/code> \u7d50\u69cb\u53ef\u4ee5\u6355\u6349\u57f7\u884c\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\uff0c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>\nBEGIN TRY\n    -- \u5617\u8a66\u57f7\u884c\u7684\u7a0b\u5f0f\u78bc\n    DECLARE @Result INT\n    SET @Result = 10 \/ 0  -- \u9019\u88e1\u6703\u7522\u751f\u9664\u4ee5\u96f6\u7684\u932f\u8aa4\nEND TRY\nBEGIN CATCH\n    PRINT '\u767c\u751f\u932f\u8aa4\uff1a' + ERROR_MESSAGE()\nEND CATCH\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u7576\u57f7\u884c\u9664\u4ee5\u96f6\u7684\u64cd\u4f5c\u6642\uff0c\u932f\u8aa4\u6703\u88ab\u6355\u6349\u4e26\u8f38\u51fa\u932f\u8aa4\u8a0a\u606f\u3002<\/p>\n<h2 id=\"%e8%ae%8a%e6%95%b8%e5%ae%a3%e5%91%8a%e8%88%87%e8%b3%a6%e5%80%bc-KpZSSjjTca\">\u8b8a\u6578\u5ba3\u544a\u8207\u8ce6\u503c<\/h2>\n<p>\u5728 T-SQL \u4e2d\uff0c\u8b8a\u6578\u7684\u4f7f\u7528\u662f\u975e\u5e38\u666e\u904d\u7684\u3002\u4f7f\u7528 <code>DECLARE<\/code> \u8a9e\u53e5\u4f86\u5ba3\u544a\u8b8a\u6578\uff0c\u4e26\u4f7f\u7528 <code>SET<\/code> \u8a9e\u53e5\u4f86\u8ce6\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>\nDECLARE @Name NVARCHAR(50)\nSET @Name = 'Server.HK'\nPRINT '\u6b61\u8fce\u4f86\u5230 ' + @Name\n<\/code><\/pre>\n<p>\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5ba3\u544a\u4e86\u4e00\u500b\u8b8a\u6578 <code>@Name<\/code>\uff0c\u4e26\u5c07\u5176\u8ce6\u503c\u70ba\u300cServer.HK\u300d\uff0c\u7136\u5f8c\u8f38\u51fa\u6b61\u8fce\u8a0a\u606f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-KpZSSjjTca\">\u7e3d\u7d50<\/h2>\n<p>T-SQL \u7684\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u63a7\u5236\u7a0b\u5f0f\u7684\u57f7\u884c\u6d41\u7a0b\u3002\u900f\u904e\u689d\u4ef6\u8a9e\u53e5\u3001\u8ff4\u5708\u8a9e\u53e5\u3001\u932f\u8aa4\u8655\u7406\u53ca\u8b8a\u6578\u7684\u4f7f\u7528\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u7de8\u5beb\u51fa\u66f4\u70ba\u9748\u6d3b\u548c\u7a69\u5b9a\u7684\u8cc7\u6599\u5eab\u61c9\u7528\u7a0b\u5f0f\u3002\u7121\u8ad6\u662f\u5728\u9032\u884c\u8cc7\u6599\u67e5\u8a62\u9084\u662f\u8cc7\u6599\u64cd\u4f5c\uff0c\u638c\u63e1\u9019\u4e9b\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0e T-SQL \u67e5\u8a62\u9032\u968e\u4e2d\u7684\u6d41\u7a0b\u63a7\u5236\u8a9e\u53e5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7ba1\u7406\u67e5\u8a62\u908f\u8f2f\u8207\u57f7\u884c\u6d41\u7a0b\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-168821","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168821","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=168821"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168821\/revisions"}],"predecessor-version":[{"id":168822,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168821\/revisions\/168822"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168821"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168821"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}