{"id":169349,"date":"2024-11-06T18:54:21","date_gmt":"2024-11-06T10:54:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/169349\/"},"modified":"2024-11-06T18:54:21","modified_gmt":"2024-11-06T10:54:21","slug":"%e5%a6%99%e7%94%a8mssql%e5%ad%90%e9%80%a3%e6%8e%a5%ef%bc%9a%e5%bf%ab%e9%80%9f%e5%88%aa%e9%99%a4%e8%a8%98%e9%8c%84%ef%bc%88mssql%e5%ad%90%e9%80%a3%e6%8e%a5%e6%9f%a5%e8%a9%a2%e5%88%aa%e9%99%a4%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/169349\/","title":{"rendered":"\u5999\u7528MSSQL\u5b50\u9023\u63a5\uff1a\u5feb\u901f\u522a\u9664\u8a18\u9304\uff08mssql\u5b50\u9023\u63a5\u67e5\u8a62\u522a\u9664\uff09"},"content":{"rendered":"<h1 id=\"%e5%a6%99%e7%94%a8mssql%e5%ad%90%e9%80%a3%e6%8e%a5%ef%bc%9a%e5%bf%ab%e9%80%9f%e5%88%aa%e9%99%a4%e8%a8%98%e9%8c%84-kEFaRIFilt\">\u5999\u7528MSSQL\u5b50\u9023\u63a5\uff1a\u5feb\u901f\u522a\u9664\u8a18\u9304<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u522a\u9664\u4e0d\u5fc5\u8981\u7684\u8a18\u9304\u662f\u4e00\u9805\u5e38\u898b\u7684\u4efb\u52d9\u3002\u5c0d\u65bc\u4f7f\u7528Microsoft SQL Server\uff08MSSQL\uff09\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u5b50\u9023\u63a5\uff08Subquery\uff09\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u9ad8\u6548\u5730\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528MSSQL\u7684\u5b50\u9023\u63a5\u4f86\u5feb\u901f\u522a\u9664\u8a18\u9304\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%ad%90%e9%80%a3%e6%8e%a5%ef%bc%9f-kEFaRIFilt\">\u4ec0\u9ebc\u662f\u5b50\u9023\u63a5\uff1f<\/h2>\n<p>\u5b50\u9023\u63a5\u662f\u6307\u5728\u4e00\u500bSQL\u67e5\u8a62\u4e2d\u5d4c\u5957\u7684\u53e6\u4e00\u500b\u67e5\u8a62\u3002\u5b83\u53ef\u4ee5\u7528\u65bc\u9078\u64c7\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\uff0c\u4e26\u4e14\u80fd\u5920\u6839\u64da\u5916\u90e8\u67e5\u8a62\u7684\u7d50\u679c\u4f86\u7be9\u9078\u6578\u64da\u3002\u4f7f\u7528\u5b50\u9023\u63a5\u7684\u597d\u8655\u5728\u65bc\uff0c\u5b83\u80fd\u5920\u5728\u4e00\u500b\u67e5\u8a62\u4e2d\u5b8c\u6210\u591a\u500b\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%ad%90%e9%80%a3%e6%8e%a5%e5%88%aa%e9%99%a4%e8%a8%98%e9%8c%84%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-kEFaRIFilt\">\u4f7f\u7528\u5b50\u9023\u63a5\u522a\u9664\u8a18\u9304\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728MSSQL\u4e2d\uff0c\u4f7f\u7528\u5b50\u9023\u63a5\u522a\u9664\u8a18\u9304\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d\nWHERE \u689d\u4ef6 IN (SELECT \u5217\u540d FROM \u5176\u4ed6\u8868 WHERE \u689d\u4ef6);<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u7684\u610f\u601d\u662f\uff1a\u5f9e\u6307\u5b9a\u7684\u8868\u4e2d\u522a\u9664\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\uff0c\u9019\u4e9b\u689d\u4ef6\u662f\u57fa\u65bc\u53e6\u4e00\u500b\u67e5\u8a62\u7684\u7d50\u679c\u3002<\/p>\n<h2 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e5%88%aa%e9%99%a4%e4%b8%8d%e5%bf%85%e8%a6%81%e7%9a%84%e7%94%a8%e6%88%b6%e8%a8%98%e9%8c%84-kEFaRIFilt\">\u7bc4\u4f8b\uff1a\u522a\u9664\u4e0d\u5fc5\u8981\u7684\u7528\u6236\u8a18\u9304<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<strong>Users<\/strong>\uff08\u7528\u6236\u8868\uff09\u548c<strong>Orders<\/strong>\uff08\u8a02\u55ae\u8868\uff09\u3002\u6211\u5011\u5e0c\u671b\u522a\u9664\u90a3\u4e9b\u6c92\u6709\u4efb\u4f55\u8a02\u55ae\u7684\u7528\u6236\u8a18\u9304\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM Users\nWHERE UserID NOT IN (SELECT UserID FROM Orders);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5f9e<strong>Orders<\/strong>\u8868\u4e2d\u9078\u64c7\u6240\u6709\u7684<strong>UserID<\/strong>\uff0c\u7136\u5f8c\u522a\u9664<strong>Users<\/strong>\u8868\u4e2d\u90a3\u4e9b\u4e0d\u5728\u9019\u500b\u5217\u8868\u4e2d\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8join%e9%80%b2%e8%a1%8c%e5%88%aa%e9%99%a4-kEFaRIFilt\">\u4f7f\u7528JOIN\u9032\u884c\u522a\u9664<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528\u5b50\u9023\u63a5\uff0c\u9084\u53ef\u4ee5\u4f7f\u7528JOIN\u4f86\u522a\u9664\u8a18\u9304\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u80fd\u66f4\u9ad8\u6548\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528JOIN\u522a\u9664\u8a18\u9304\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>DELETE u\nFROM Users u\nLEFT JOIN Orders o ON u.UserID = o.UserID\nWHERE o.UserID IS NULL;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u7684\u610f\u601d\u662f\uff1a\u5f9e<strong>Users<\/strong>\u8868\u4e2d\u522a\u9664\u90a3\u4e9b\u5728<strong>Orders<\/strong>\u8868\u4e2d\u6c92\u6709\u5c0d\u61c9\u8a18\u9304\u7684\u7528\u6236\u3002\u9019\u6a23\u7684\u67e5\u8a62\u901a\u5e38\u80fd\u5920\u63d0\u9ad8\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-kEFaRIFilt\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u52d9\u5fc5\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u522a\u9664\u91cd\u8981\u8a18\u9304\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u67e5\u8a62\uff1a<\/strong>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u5148\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u9a57\u8b49\u67e5\u8a62\u7684\u6b63\u78ba\u6027\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5728\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u6642\uff0c\u8003\u616e\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-kEFaRIFilt\">\u7e3d\u7d50<\/h2>\n<p>\u5229\u7528MSSQL\u7684\u5b50\u9023\u63a5\u4f86\u5feb\u901f\u522a\u9664\u8a18\u9304\u662f\u4e00\u7a2e\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u65b9\u6cd5\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u5b50\u9023\u63a5\u548cJOIN\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u4fdd\u6301\u6578\u64da\u5b8c\u6574\u6027\u7684\u540c\u6642\uff0c\u5feb\u901f\u6e05\u7406\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5229\u7528MSSQL\u5b50\u9023\u63a5\u5feb\u901f\u522a\u9664\u8a18\u9304\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u904e\u7a0b\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u6e05\u7406\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-169349","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/169349","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=169349"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/169349\/revisions"}],"predecessor-version":[{"id":169350,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/169349\/revisions\/169350"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=169349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=169349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=169349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}