{"id":76484,"date":"2024-10-16T07:03:14","date_gmt":"2024-10-15T23:03:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76484\/"},"modified":"2024-10-16T07:03:14","modified_gmt":"2024-10-15T23:03:14","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e8%a1%8c%e5%88%aa%e9%99%a4%e7%a4%ba%e4%be%8b-mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e8%a1%8c%e5%88%aa%e9%99%a4","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76484\/","title":{"rendered":"MySQL\u6578\u64da\u5eab\u591a\u884c\u522a\u9664\u793a\u4f8b (MySQL\u6578\u64da\u5eab\u591a\u884c\u522a\u9664)"},"content":{"rendered":"<h1 id=\"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e8%a1%8c%e5%88%aa%e9%99%a4%e7%a4%ba%e4%be%8b-mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e8%a1%8c%e5%88%aa%e9%99%a4-nFAfuejiZn\">MySQL\u6578\u64da\u5eab\u591a\u884c\u522a\u9664\u793a\u4f8b (MySQL\u6578\u64da\u5eab\u591a\u884c\u522a\u9664)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\u662f\u4e00\u9805\u5e38\u898b\u7684\u64cd\u4f5c\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u522a\u9664\u6578\u64da\u3002\u672c\u6587\u5c07\u91cd\u9ede\u4ecb\u7d39\u5982\u4f55\u5728MySQL\u4e2d\u9032\u884c\u591a\u884c\u522a\u9664\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e8%a1%8c%e5%88%aa%e9%99%a4%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-nFAfuejiZn\">\u591a\u884c\u522a\u9664\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u522a\u9664\u6578\u64da\u7684\u57fa\u672c\u8a9e\u6cd5\u662f\u4f7f\u7528DELETE\u8a9e\u53e5\u3002\u5c0d\u65bc\u591a\u884c\u522a\u9664\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528WHERE\u5b50\u53e5\u4f86\u6307\u5b9a\u8981\u522a\u9664\u7684\u689d\u4ef6\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u7684\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u5982\u679c\u9700\u8981\u522a\u9664\u591a\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528IN\u904b\u7b97\u7b26\u6216OR\u904b\u7b97\u7b26\u4f86\u6307\u5b9a\u591a\u500b\u689d\u4ef6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d WHERE \u5217\u540d IN (\u503c1, \u503c2, \u503c3);<\/code><\/pre>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%88%aa%e9%99%a4%e7%89%b9%e5%ae%9a%e6%a2%9d%e4%bb%b6%e7%9a%84%e5%a4%9a%e8%a1%8c%e6%95%b8%e6%93%9a-nFAfuejiZn\">\u793a\u4f8b\uff1a\u522a\u9664\u7279\u5b9a\u689d\u4ef6\u7684\u591a\u884c\u6578\u64da<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u7528\u6236\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u5305\u62ec\u7528\u6236ID\u3001\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002\u73fe\u5728\uff0c\u6211\u5011\u5e0c\u671b\u522a\u9664\u7528\u6236ID\u70ba1\u30012\u548c3\u7684\u7528\u6236\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE user_id IN (1, 2, 3);<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0cID\u70ba1\u30012\u548c3\u7684\u7528\u6236\u5c07\u88ab\u522a\u9664\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8join%e9%80%b2%e8%a1%8c%e5%a4%9a%e8%a1%8c%e5%88%aa%e9%99%a4-nFAfuejiZn\">\u4f7f\u7528JOIN\u9032\u884c\u591a\u884c\u522a\u9664<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u6839\u64da\u53e6\u4e00\u500b\u8868\u7684\u6578\u64da\u4f86\u522a\u9664\u591a\u884c\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528JOIN\u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u201corders\u201d\u8868\u548c\u4e00\u500b\u201cusers\u201d\u8868\uff0c\u6211\u5011\u5e0c\u671b\u522a\u9664\u6240\u6709\u6c92\u6709\u8a02\u55ae\u7684\u7528\u6236\uff1a<\/p>\n<pre><code>DELETE users FROM users\nJOIN orders ON users.user_id = orders.user_id\nWHERE orders.user_id IS NULL;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u522a\u9664\u6240\u6709\u5728\u201cusers\u201d\u8868\u4e2d\u4f46\u5728\u201corders\u201d\u8868\u4e2d\u6c92\u6709\u5c0d\u61c9\u8a02\u55ae\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-nFAfuejiZn\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u522a\u9664\u91cd\u8981\u4fe1\u606f\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5728\u9032\u884c\u5927\u898f\u6a21\u522a\u9664\u6642\uff0c\u8003\u616e\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u6aa2\u67e5\u689d\u4ef6\uff1a<\/strong>\u5728\u57f7\u884cDELETE\u8a9e\u53e5\u4e4b\u524d\uff0c\u6700\u597d\u5148\u4f7f\u7528SELECT\u8a9e\u53e5\u6aa2\u67e5\u5c07\u8981\u522a\u9664\u7684\u6578\u64da\uff0c\u4ee5\u907f\u514d\u8aa4\u522a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-nFAfuejiZn\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u65b9\u5f0f\u4f86\u9032\u884c\u591a\u884c\u522a\u9664\uff0c\u7121\u8ad6\u662f\u901a\u904eIN\u904b\u7b97\u7b26\u9084\u662fJOIN\u8a9e\u53e5\uff0c\u5747\u80fd\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002\u6b63\u78ba\u4f7f\u7528DELETE\u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u7dad\u8b77\u6578\u64da\u5eab\u7684\u6574\u6f54\u548c\u6027\u80fd\u3002\u5728\u9032\u884c\u4efb\u4f55\u522a\u9664\u64cd\u4f5c\u6642\uff0c\u52d9\u5fc5\u8b39\u614e\uff0c\u4e26\u8003\u616e\u5099\u4efd\u548c\u4e8b\u52d9\u7684\u4f7f\u7528\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u548c\u9ad8\u6548\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6578\u64da\u5eab\u4e2d\u591a\u884c\u522a\u9664\u7684\u793a\u4f8b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u522a\u9664\u591a\u689d\u8a18\u9304\u4ee5\u512a\u5316\u6578\u64da\u7ba1\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-76484","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76484","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=76484"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76484\/revisions"}],"predecessor-version":[{"id":76485,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76484\/revisions\/76485"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}