{"id":195447,"date":"2024-11-13T15:04:19","date_gmt":"2024-11-13T07:04:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/195447\/"},"modified":"2024-11-13T15:04:20","modified_gmt":"2024-11-13T07:04:20","slug":"%e8%88%87t-sql%e8%aa%9e%e5%8f%a5%e7%9a%84%e6%8f%8f%e8%bf%b0%e8%88%87t-sql%e8%aa%9e%e5%8f%a5%e7%9a%84%e6%8f%8f%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/195447\/","title":{"rendered":"\u8207T-SQL\u8a9e\u53e5\u7684\u63cf\u8ff0\u8207T-SQL\u8a9e\u53e5\u7684\u63cf\u8ff0"},"content":{"rendered":"<h1 id=\"%e8%88%87t-sql%e8%aa%9e%e5%8f%a5%e7%9a%84%e6%8f%8f%e8%bf%b0-RnEtYeQzXm\">\u8207T-SQL\u8a9e\u53e5\u7684\u63cf\u8ff0<\/h1>\n<p>T-SQL\uff08Transact-SQL\uff09\u662f\u5fae\u8edfSQL Server\u7684\u64f4\u5c55SQL\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u8a31\u591a\u529f\u80fd\u4f86\u589e\u5f37\u6578\u64da\u5eab\u7684\u64cd\u4f5c\u548c\u7ba1\u7406\u3002T-SQL\u4e0d\u50c5\u652f\u6301\u6a19\u6e96SQL\u7684\u57fa\u672c\u67e5\u8a62\u529f\u80fd\uff0c\u9084\u5305\u62ec\u63a7\u5236\u6d41\u7a0b\u3001\u932f\u8aa4\u8655\u7406\u3001\u8b8a\u6578\u548c\u5176\u4ed6\u529f\u80fd\uff0c\u4f7f\u5176\u6210\u70ba\u4e00\u7a2e\u5f37\u5927\u7684\u6578\u64da\u64cd\u4f5c\u5de5\u5177\u3002<\/p>\n<h2 id=\"t-sql%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-RnEtYeQzXm\">T-SQL\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>T-SQL\u8a9e\u53e5\u7684\u57fa\u672c\u7d50\u69cb\u5305\u62ec\u9078\u64c7\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u7b49\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684T-SQL\u8a9e\u53e5\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e9%81%b8%e6%93%87%e8%aa%9e%e5%8f%a5-RnEtYeQzXm\">\u9078\u64c7\u8a9e\u53e5<\/h3>\n<pre><code>SELECT * FROM Customers WHERE Country = 'USA';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5f9eCustomers\u8868\u4e2d\u9078\u64c7\u6240\u6709\u4f86\u81ea\u7f8e\u570b\u7684\u5ba2\u6236\u3002<\/p>\n<h3 id=\"%e6%8f%92%e5%85%a5%e8%aa%9e%e5%8f%a5-RnEtYeQzXm\">\u63d2\u5165\u8a9e\u53e5<\/h3>\n<pre><code>INSERT INTO Customers (CustomerName, Country) VALUES ('\u65b0\u5ba2\u6236', '\u9999\u6e2f');<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u4e00\u500b\u65b0\u7684\u5ba2\u6236\u63d2\u5165\u5230Customers\u8868\u4e2d\u3002<\/p>\n<h3 id=\"%e6%9b%b4%e6%96%b0%e8%aa%9e%e5%8f%a5-RnEtYeQzXm\">\u66f4\u65b0\u8a9e\u53e5<\/h3>\n<pre><code>UPDATE Customers SET Country = '\u4e2d\u570b' WHERE CustomerName = '\u65b0\u5ba2\u6236';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u540d\u70ba\u201c\u65b0\u5ba2\u6236\u201d\u7684\u5ba2\u6236\u7684\u570b\u5bb6\u66f4\u65b0\u70ba\u4e2d\u570b\u3002<\/p>\n<h3 id=\"%e5%88%aa%e9%99%a4%e8%aa%9e%e5%8f%a5-RnEtYeQzXm\">\u522a\u9664\u8a9e\u53e5<\/h3>\n<pre><code>DELETE FROM Customers WHERE CustomerName = '\u65b0\u5ba2\u6236';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u522a\u9664\u540d\u70ba\u201c\u65b0\u5ba2\u6236\u201d\u7684\u5ba2\u6236\u8a18\u9304\u3002<\/p>\n<h2 id=\"t-sql%e7%9a%84%e6%8e%a7%e5%88%b6%e6%b5%81%e7%a8%8b-RnEtYeQzXm\">T-SQL\u7684\u63a7\u5236\u6d41\u7a0b<\/h2>\n<p>T-SQL\u9084\u652f\u6301\u63a7\u5236\u6d41\u7a0b\u8a9e\u53e5\uff0c\u4f8b\u5982IF&#8230;ELSE\u3001WHILE\u5faa\u74b0\u7b49\uff0c\u9019\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u7de8\u5beb\u66f4\u8907\u96dc\u7684\u908f\u8f2f\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528IF\u8a9e\u53e5\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>IF EXISTS (SELECT * FROM Customers WHERE Country = 'USA')\nBEGIN\n    PRINT '\u7f8e\u570b\u5ba2\u6236\u5b58\u5728';\nEND\nELSE\nBEGIN\n    PRINT '\u7f8e\u570b\u5ba2\u6236\u4e0d\u5b58\u5728';\nEND;<\/code><\/pre>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e8%99%95%e7%90%86-RnEtYeQzXm\">\u932f\u8aa4\u8655\u7406<\/h2>\n<p>T-SQL\u63d0\u4f9b\u4e86TRY&#8230;CATCH\u7d50\u69cb\u4f86\u8655\u7406\u932f\u8aa4\u3002\u9019\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u6355\u7372\u57f7\u884c\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\u4e26\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\u3002\u4ee5\u4e0b\u662fTRY&#8230;CATCH\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN TRY\n    -- \u5617\u8a66\u57f7\u884c\u7684\u4ee3\u78bc\n    INSERT INTO Customers (CustomerName, Country) VALUES ('\u932f\u8aa4\u5ba2\u6236', NULL);\nEND TRY\nBEGIN CATCH\n    PRINT '\u767c\u751f\u932f\u8aa4\uff1a' + ERROR_MESSAGE();\nEND CATCH;<\/code><\/pre>\n<h2 id=\"%e8%ae%8a%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8-RnEtYeQzXm\">\u8b8a\u6578\u7684\u4f7f\u7528<\/h2>\n<p>T-SQL\u5141\u8a31\u4f7f\u7528\u8b8a\u6578\u4f86\u5b58\u5132\u6578\u64da\uff0c\u9019\u5c0d\u65bc\u5728\u67e5\u8a62\u4e2d\u9032\u884c\u8a08\u7b97\u6216\u5b58\u5132\u4e2d\u9593\u7d50\u679c\u975e\u5e38\u6709\u7528\u3002\u4ee5\u4e0b\u662f\u8b8a\u6578\u7684\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n<pre><code>DECLARE @CustomerCount INT;\nSELECT @CustomerCount = COUNT(*) FROM Customers;\nPRINT '\u5ba2\u6236\u6578\u91cf\uff1a' + CAST(@CustomerCount AS VARCHAR);<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-RnEtYeQzXm\">\u7d50\u8ad6<\/h2>\n<p>T-SQL\u662f\u4e00\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u6578\u64da\u5eab\u67e5\u8a62\u8a9e\u8a00\uff0c\u901a\u904e\u5176\u64f4\u5c55\u7684\u529f\u80fd\uff0c\u958b\u767c\u8005\u80fd\u5920\u66f4\u9748\u6d3b\u5730\u64cd\u4f5c\u6578\u64da\u3002\u7121\u8ad6\u662f\u57fa\u672c\u7684\u6578\u64da\u64cd\u4f5c\u9084\u662f\u8907\u96dc\u7684\u908f\u8f2f\u8655\u7406\uff0cT-SQL\u90fd\u80fd\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u638c\u63e1T-SQL\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u7a0b\u5e8f\u6258\u7ba1\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22T-SQL\u8a9e\u53e5\u7684\u63cf\u8ff0\uff0c\u4e86\u89e3\u5176\u8a9e\u6cd5\u3001\u529f\u80fd\u53ca\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u8207\u7ba1\u7406\u7684\u6548\u7387\u8207\u7cbe\u78ba\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-195447","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195447","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=195447"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195447\/revisions"}],"predecessor-version":[{"id":195448,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195447\/revisions\/195448"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=195447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=195447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=195447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}