{"id":76296,"date":"2024-10-16T05:29:14","date_gmt":"2024-10-15T21:29:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76296\/"},"modified":"2024-10-16T05:29:14","modified_gmt":"2024-10-15T21:29:14","slug":"mysql%e5%88%aa%e9%99%a4%e8%a1%a8%e5%96%ae%e6%95%b8%e6%93%9a%e7%9a%84%e5%af%a6%e9%9a%9b%e6%93%8d%e4%bd%9c%e6%b5%81%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76296\/","title":{"rendered":"MySQL\u522a\u9664\u8868\u55ae\u6578\u64da\u7684\u5be6\u969b\u64cd\u4f5c\u6d41\u7a0b"},"content":{"rendered":"<h1 id=\"mysql%e5%88%aa%e9%99%a4%e8%a1%a8%e5%96%ae%e6%95%b8%e6%93%9a%e7%9a%84%e5%af%a6%e9%9a%9b%e6%93%8d%e4%bd%9c%e6%b5%81%e7%a8%8b-rZPtYBHgSw\">MySQL\u522a\u9664\u8868\u55ae\u6578\u64da\u7684\u5be6\u969b\u64cd\u4f5c\u6d41\u7a0b<\/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\u8868\u55ae\u4e2d\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5728MySQL\u4e2d\u522a\u9664\u8868\u55ae\u6578\u64da\u7684\u5be6\u969b\u64cd\u4f5c\u6d41\u7a0b\uff0c\u5305\u62ec\u4f7f\u7528DELETE\u8a9e\u53e5\u3001TRUNCATE\u8a9e\u53e5\u4ee5\u53caDROP\u8a9e\u53e5\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8delete%e8%aa%9e%e5%8f%a5-rZPtYBHgSw\">1. \u4f7f\u7528DELETE\u8a9e\u53e5<\/h2>\n<p>DELETE\u8a9e\u53e5\u662f\u7528\u4f86\u5f9e\u8868\u4e2d\u522a\u9664\u7279\u5b9a\u884c\u7684\u6700\u5e38\u7528\u65b9\u6cd5\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u522a\u9664\u7528\u6236ID\u70ba5\u7684\u8a18\u9304\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE id = 5;<\/code><\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cDELETE\u8a9e\u53e5\u53ef\u4ee5\u6839\u64da\u689d\u4ef6\u522a\u9664\u7279\u5b9a\u7684\u884c\u3002\u5982\u679c\u4e0d\u52a0WHERE\u689d\u4ef6\uff0c\u5247\u6703\u522a\u9664\u8868\u4e2d\u6240\u6709\u7684\u6578\u64da\uff0c\u9019\u901a\u5e38\u4e0d\u662f\u6211\u5011\u7684\u610f\u5716\u3002<\/p>\n<h3 id=\"1-1-%e5%88%aa%e9%99%a4%e5%a4%9a%e6%a2%9d%e8%a8%98%e9%8c%84-rZPtYBHgSw\">1.1 \u522a\u9664\u591a\u689d\u8a18\u9304<\/h3>\n<p>\u5982\u679c\u9700\u8981\u522a\u9664\u591a\u689d\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528IN\u95dc\u9375\u5b57\u3002\u4f8b\u5982\uff0c\u522a\u9664\u7528\u6236ID\u70ba1\u30012\u548c3\u7684\u8a18\u9304\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE id IN (1, 2, 3);<\/code><\/pre>\n<h3 id=\"1-2-%e4%bd%bf%e7%94%a8limit%e9%99%90%e5%88%b6%e5%88%aa%e9%99%a4%e6%95%b8%e9%87%8f-rZPtYBHgSw\">1.2 \u4f7f\u7528LIMIT\u9650\u5236\u522a\u9664\u6578\u91cf<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u9650\u5236\u522a\u9664\u7684\u884c\u6578\u3002\u53ef\u4ee5\u4f7f\u7528LIMIT\u5b50\u53e5\u4f86\u9054\u6210\u9019\u4e00\u76ee\u7684\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE status = 'inactive' LIMIT 10;<\/code><\/pre>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8truncate%e8%aa%9e%e5%8f%a5-rZPtYBHgSw\">2. \u4f7f\u7528TRUNCATE\u8a9e\u53e5<\/h2>\n<p>TRUNCATE\u8a9e\u53e5\u7528\u65bc\u5feb\u901f\u522a\u9664\u8868\u4e2d\u7684\u6240\u6709\u6578\u64da\uff0c\u4f46\u4e0d\u6703\u522a\u9664\u8868\u672c\u8eab\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>TRUNCATE TABLE \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u522a\u9664\u201cusers\u201d\u8868\u4e2d\u7684\u6240\u6709\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>TRUNCATE TABLE users;<\/code><\/pre>\n<p>TRUNCATE\u64cd\u4f5c\u6bd4DELETE\u66f4\u5feb\uff0c\u56e0\u70ba\u5b83\u4e0d\u6703\u9010\u884c\u522a\u9664\u6578\u64da\uff0c\u800c\u662f\u76f4\u63a5\u91cb\u653e\u6574\u500b\u6578\u64da\u9801\u9762\u3002<\/p>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8drop%e8%aa%9e%e5%8f%a5-rZPtYBHgSw\">3. \u4f7f\u7528DROP\u8a9e\u53e5<\/h2>\n<p>\u5982\u679c\u60a8\u5e0c\u671b\u5b8c\u5168\u522a\u9664\u4e00\u500b\u8868\u53ca\u5176\u6240\u6709\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528DROP\u8a9e\u53e5\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DROP TABLE \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u522a\u9664\u201cusers\u201d\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>DROP TABLE users;<\/code><\/pre>\n<p>\u8acb\u6ce8\u610f\uff0c\u4f7f\u7528DROP\u8a9e\u53e5\u5c07\u6c38\u4e45\u522a\u9664\u8868\u53ca\u5176\u6240\u6709\u6578\u64da\uff0c\u9019\u662f\u4e0d\u53ef\u9006\u7684\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"4-%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-rZPtYBHgSw\">4. \u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u4e1f\u5931\u3002<\/li>\n<li>\u4f7f\u7528DELETE\u6642\uff0c\u52d9\u5fc5\u52a0\u4e0aWHERE\u689d\u4ef6\uff0c\u4ee5\u907f\u514d\u522a\u9664\u6240\u6709\u6578\u64da\u3002<\/li>\n<li>TRUNCATE\u548cDROP\u64cd\u4f5c\u7121\u6cd5\u6062\u5fa9\uff0c\u8acb\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rZPtYBHgSw\">\u7e3d\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u522a\u9664\u8868\u55ae\u6578\u64da\u7684\u64cd\u4f5c\u53ef\u4ee5\u901a\u904eDELETE\u3001TRUNCATE\u548cDROP\u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u6bcf\u7a2e\u65b9\u6cd5\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7528\u9014\u548c\u6ce8\u610f\u4e8b\u9805\uff0c\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u7ba1\u7406\u6578\u64da\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u65b9\u6848\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u78ba\u4fdd\u60a8\u7684\u6578\u64da\u5b89\u5168\u548c\u9ad8\u6548\u7ba1\u7406\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u522a\u9664\u8868\u55ae\u6578\u64da\u7684\u5be6\u969b\u64cd\u4f5c\u6d41\u7a0b\uff0c\u638c\u63e1DELETE\u8a9e\u53e5\u7684\u4f7f\u7528\u53ca\u6ce8\u610f\u4e8b\u9805\uff0c\u78ba\u4fdd\u6578\u64da\u5b89\u5168\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-76296","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76296","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=76296"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76296\/revisions"}],"predecessor-version":[{"id":76297,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76296\/revisions\/76297"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}