{"id":179336,"date":"2024-11-09T00:58:18","date_gmt":"2024-11-08T16:58:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179336\/"},"modified":"2024-11-09T00:58:19","modified_gmt":"2024-11-08T16:58:19","slug":"%e5%a6%82%e4%bd%95%e7%94%a8-sql-%e8%aa%9e%e5%8f%a5%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8-sql-%e8%aa%9e%e5%8f%a5%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179336\/","title":{"rendered":"\u5982\u4f55\u7528 SQL \u8a9e\u53e5\u6e05\u7a7a\u6578\u64da\u5eab\u8868 (sql \u8a9e\u53e5\u6e05\u7a7a\u6578\u64da\u5eab\u8868)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e7%94%a8-sql-%e8%aa%9e%e5%8f%a5%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8-RmQETMNyAE\">\u5982\u4f55\u7528 SQL \u8a9e\u53e5\u6e05\u7a7a\u6578\u64da\u5eab\u8868<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6e05\u7a7a\u6578\u64da\u5eab\u8868\u662f\u4e00\u500b\u5e38\u898b\u7684\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u56e0\u70ba\u9700\u8981\u91cd\u7f6e\u6e2c\u8a66\u74b0\u5883\uff0c\u9084\u662f\u56e0\u70ba\u9700\u8981\u6e05\u9664\u904e\u6642\u7684\u6578\u64da\uff0c\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u6e05\u7a7a\u8868\u683c\u90fd\u662f\u4e00\u500b\u6709\u6548\u7684\u65b9\u6cd5\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u6e05\u7a7a\u6578\u64da\u5eab\u8868\uff0c\u4e26\u63a2\u8a0e\u4e0d\u540c\u65b9\u6cd5\u7684\u512a\u7f3a\u9ede\u3002<\/p>\n<h2 id=\"%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95-RmQETMNyAE\">\u6e05\u7a7a\u6578\u64da\u5eab\u8868\u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u6e05\u7a7a\u6578\u64da\u5eab\u8868\u4e3b\u8981\u6709\u5169\u7a2e\u65b9\u6cd5\uff1a\u4f7f\u7528 <code>TRUNCATE<\/code> \u8a9e\u53e5\u548c <code>DELETE<\/code> \u8a9e\u53e5\u3002<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-truncate-%e8%aa%9e%e5%8f%a5-RmQETMNyAE\">1. \u4f7f\u7528 TRUNCATE \u8a9e\u53e5<\/h3>\n<p><code>TRUNCATE<\/code> \u662f\u4e00\u500b\u5feb\u901f\u4e14\u9ad8\u6548\u7684\u65b9\u5f0f\u4f86\u6e05\u7a7a\u8868\u683c\u3002\u5b83\u6703\u522a\u9664\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u4f46\u4e0d\u6703\u8a18\u9304\u6bcf\u4e00\u884c\u7684\u522a\u9664\u64cd\u4f5c\uff0c\u56e0\u6b64\u901f\u5ea6\u8f03\u5feb\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>TRUNCATE<\/code> \u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>TRUNCATE TABLE \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u60f3\u8981\u6e05\u7a7a\u5b83\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>TRUNCATE TABLE users;<\/code><\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<code>TRUNCATE<\/code> \u6703\u91cd\u7f6e\u81ea\u589e\u5217\u7684\u8a08\u6578\u5668\uff0c\u9019\u610f\u5473\u8457\u5982\u679c\u8868\u4e2d\u6709\u81ea\u589e\u4e3b\u9375\uff0c\u4e0b\u4e00\u6b21\u63d2\u5165\u6578\u64da\u6642\uff0c\u4e3b\u9375\u7684\u503c\u5c07\u5f9e\u521d\u59cb\u503c\u958b\u59cb\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-delete-%e8%aa%9e%e5%8f%a5-RmQETMNyAE\">2. \u4f7f\u7528 DELETE \u8a9e\u53e5<\/h3>\n<p>\u53e6\u4e00\u7a2e\u6e05\u7a7a\u8868\u683c\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 <code>DELETE<\/code> \u8a9e\u53e5\u3002\u9019\u7a2e\u65b9\u6cd5\u53ef\u4ee5\u66f4\u9748\u6d3b\u5730\u63a7\u5236\u522a\u9664\u7684\u884c\uff0c\u4e26\u4e14\u53ef\u4ee5\u6839\u64da\u689d\u4ef6\u522a\u9664\u7279\u5b9a\u7684\u884c\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>DELETE<\/code> \u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u6e05\u7a7a <code>users<\/code> \u8868\u7684\u8a9e\u53e5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM users;<\/code><\/pre>\n<p>\u4f7f\u7528 <code>DELETE<\/code> \u8a9e\u53e5\u7684\u512a\u9ede\u662f\u53ef\u4ee5\u5728\u522a\u9664\u6578\u64da\u4e4b\u524d\u9032\u884c\u689d\u4ef6\u7be9\u9078\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &lt; 18;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u8a9e\u53e5\u5c07\u53ea\u522a\u9664\u5e74\u9f61\u5c0f\u65bc 18 \u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"truncate-%e8%88%87-delete-%e7%9a%84%e6%af%94%e8%bc%83-RmQETMNyAE\">TRUNCATE \u8207 DELETE \u7684\u6bd4\u8f03<\/h2>\n<p>\u96d6\u7136 <code>TRUNCATE<\/code> \u548c <code>DELETE<\/code> \u90fd\u53ef\u4ee5\u7528\u4f86\u6e05\u7a7a\u8868\u683c\uff0c\u4f46\u5b83\u5011\u4e4b\u9593\u6709\u4e00\u4e9b\u91cd\u8981\u7684\u5340\u5225\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\uff1a<\/strong> <code>TRUNCATE<\/code> \u901a\u5e38\u6bd4 <code>DELETE<\/code> \u66f4\u5feb\uff0c\u56e0\u70ba\u5b83\u4e0d\u6703\u9010\u884c\u522a\u9664\u6578\u64da\u3002<\/li>\n<li><strong>\u4e8b\u52d9\u652f\u6301\uff1a<\/strong> <code>DELETE<\/code> \u53ef\u4ee5\u5728\u4e8b\u52d9\u4e2d\u4f7f\u7528\uff0c\u800c <code>TRUNCATE<\/code> \u901a\u5e38\u4e0d\u80fd\u3002<\/li>\n<li><strong>\u81ea\u589e\u8a08\u6578\u5668\uff1a<\/strong> <code>TRUNCATE<\/code> \u6703\u91cd\u7f6e\u81ea\u589e\u8a08\u6578\u5668\uff0c\u800c <code>DELETE<\/code> \u4e0d\u6703\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-RmQETMNyAE\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u9019\u4e9b\u8a9e\u53e5\u4e4b\u524d\uff0c\u52d9\u5fc5\u78ba\u8a8d\u60a8\u771f\u7684\u9700\u8981\u6e05\u7a7a\u8868\u683c\uff0c\u56e0\u70ba\u9019\u4e9b\u64cd\u4f5c\u662f\u4e0d\u53ef\u9006\u7684\u3002\u5efa\u8b70\u5728\u57f7\u884c\u6e05\u7a7a\u64cd\u4f5c\u4e4b\u524d\uff0c\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u4e1f\u5931\u91cd\u8981\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-RmQETMNyAE\">\u7e3d\u7d50<\/h2>\n<p>\u6e05\u7a7a\u6578\u64da\u5eab\u8868\u662f\u4e00\u500b\u5e38\u898b\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u901a\u904e <code>TRUNCATE<\/code> \u6216 <code>DELETE<\/code> \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u9078\u64c7\u54ea\u7a2e\u65b9\u6cd5\u53d6\u6c7a\u65bc\u5177\u9ad4\u9700\u6c42\u548c\u60c5\u6cc1\u3002\u7121\u8ad6\u60a8\u9078\u64c7\u54ea\u7a2e\u65b9\u5f0f\uff0c\u8acb\u52d9\u5fc5\u5c0f\u5fc3\u64cd\u4f5c\uff0c\u4ee5\u907f\u514d\u6578\u64da\u4e1f\u5931\u3002\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u6258\u7ba1\u60a8\u7684\u6578\u64da\u5eab\uff0c\u78ba\u4fdd\u9ad8\u6548\u548c\u5b89\u5168\u7684\u6578\u64da\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u6709\u6548\u6e05\u7a7a\u6578\u64da\u5eab\u8868\uff0c\u638c\u63e1 TRUNCATE \u548c DELETE \u7684\u5340\u5225\u53ca\u61c9\u7528\u6280\u5de7\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-179336","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179336","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=179336"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179336\/revisions"}],"predecessor-version":[{"id":179337,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179336\/revisions\/179337"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}