{"id":180202,"date":"2024-11-09T08:15:18","date_gmt":"2024-11-09T00:15:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180202\/"},"modified":"2024-11-09T08:15:19","modified_gmt":"2024-11-09T00:15:19","slug":"%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95%e5%92%8c%e6%ad%a5%e9%a9%9f%e5%88%86%e6%9e%90-%e6%80%8e%e6%a8%a3%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180202\/","title":{"rendered":"\u522a\u9664\u6578\u64da\u5eab\u6578\u64da\u7684\u65b9\u6cd5\u548c\u6b65\u9a5f\u5206\u6790 (\u600e\u6a23\u522a\u9664\u6578\u64da\u5eab\u7684\u6578\u64da)"},"content":{"rendered":"<h1 id=\"%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95%e5%92%8c%e6%ad%a5%e9%a9%9f%e5%88%86%e6%9e%90-%e6%80%8e%e6%a8%a3%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab-PmPdhHEfNP\">\u522a\u9664\u6578\u64da\u5eab\u6578\u64da\u7684\u65b9\u6cd5\u548c\u6b65\u9a5f\u5206\u6790 (\u600e\u6a23\u522a\u9664\u6578\u64da\u5eab\u7684\u6578\u64da)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u522a\u9664\u6578\u64da\u662f\u4e00\u9805\u5e38\u898b\u7684\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u56e0\u70ba\u6578\u64da\u904e\u6642\u3001\u932f\u8aa4\uff0c\u9084\u662f\u56e0\u70ba\u9700\u8981\u91cb\u653e\u5b58\u5132\u7a7a\u9593\uff0c\u4e86\u89e3\u5982\u4f55\u6b63\u78ba\u5730\u522a\u9664\u6578\u64da\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u522a\u9664\u6578\u64da\u5eab\u6578\u64da\u7684\u65b9\u6cd5\u548c\u6b65\u9a5f\uff0c\u5e6b\u52a9\u8b80\u8005\u638c\u63e1\u9019\u4e00\u6280\u80fd\u3002<\/p>\n<h2 id=\"%e4%b8%80%e3%80%81%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-PmPdhHEfNP\">\u4e00\u3001\u522a\u9664\u6578\u64da\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u522a\u9664\u6578\u64da\u901a\u5e38\u662f\u6307\u5f9e\u8868\u4e2d\u79fb\u9664\u7279\u5b9a\u7684\u8a18\u9304\u3002\u9019\u4e00\u64cd\u4f5c\u53ef\u4ee5\u901a\u904e SQL \u8a9e\u53e5\u4f86\u5be6\u73fe\uff0c\u6700\u5e38\u7528\u7684\u8a9e\u53e5\u662f <code>DELETE<\/code>\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u522a\u9664\u64cd\u4f5c\u662f\u4e0d\u53ef\u9006\u7684\uff0c\u56e0\u6b64\u5728\u57f7\u884c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%ba%8c%e3%80%81%e4%bd%bf%e7%94%a8-sql-%e8%aa%9e%e5%8f%a5%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-PmPdhHEfNP\">\u4e8c\u3001\u4f7f\u7528 SQL \u8a9e\u53e5\u522a\u9664\u6578\u64da<\/h2>\n<p>\u522a\u9664\u6578\u64da\u7684\u57fa\u672c SQL \u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM \u8868\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>\u8868\u540d<\/code>\u662f\u4f60\u60f3\u8981\u522a\u9664\u6578\u64da\u7684\u8868\u7684\u540d\u7a31\uff0c\u800c<code>\u689d\u4ef6<\/code>\u5247\u662f\u7528\u4f86\u6307\u5b9a\u54ea\u4e9b\u8a18\u9304\u9700\u8981\u88ab\u522a\u9664\u7684\u689d\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u4f8b\u5b50\uff1a<\/p>\n<h3 id=\"1-%e5%88%aa%e9%99%a4%e7%89%b9%e5%ae%9a%e6%a2%9d%e4%bb%b6%e7%9a%84%e6%95%b8%e6%93%9a-PmPdhHEfNP\">1. \u522a\u9664\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u4e26\u4e14\u6211\u5011\u60f3\u8981\u522a\u9664\u6240\u6709\u5e74\u9f61\u5927\u65bc 30 \u6b72\u7684\u7528\u6236\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &gt; 30;<\/code><\/pre>\n<h3 id=\"2-%e5%88%aa%e9%99%a4%e6%89%80%e6%9c%89%e6%95%b8%e6%93%9a-PmPdhHEfNP\">2. \u522a\u9664\u6240\u6709\u6578\u64da<\/h3>\n<p>\u5982\u679c\u9700\u8981\u522a\u9664\u6574\u500b\u8868\u4e2d\u7684\u6240\u6709\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM users;<\/code><\/pre>\n<p>\u9019\u5c07\u522a\u9664 <code>users<\/code> \u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u4f46\u8868\u7d50\u69cb\u4ecd\u7136\u4fdd\u7559\u3002<\/p>\n<h3>3. \u4f7f\u7528 <code>TRUNCATE<\/code> \u8a9e\u53e5<\/h3>\n<p>\u5982\u679c\u5e0c\u671b\u5feb\u901f\u522a\u9664\u8868\u4e2d\u7684\u6240\u6709\u6578\u64da\u4e26\u91cd\u7f6e\u81ea\u589e\u4e3b\u9375\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>TRUNCATE<\/code> \u8a9e\u53e5\uff1a<\/p>\n<pre><code>TRUNCATE TABLE users;<\/code><\/pre>\n<p>\u9019\u500b\u64cd\u4f5c\u6bd4 <code>DELETE<\/code> \u66f4\u5feb\uff0c\u56e0\u70ba\u5b83\u4e0d\u6703\u9010\u884c\u522a\u9664\uff0c\u800c\u662f\u76f4\u63a5\u91cb\u653e\u6574\u500b\u8868\u7684\u7a7a\u9593\u3002<\/p>\n<h2 id=\"%e4%b8%89%e3%80%81%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-PmPdhHEfNP\">\u4e09\u3001\u522a\u9664\u6578\u64da\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u52d9\u5fc5\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\u652f\u6301\u4e8b\u52d9\u7684\u6578\u64da\u5eab\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>BEGIN TRANSACTION<\/code> \u548c <code>ROLLBACK<\/code> \u4f86\u4fdd\u8b77\u522a\u9664\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u6aa2\u67e5\u689d\u4ef6\uff1a<\/strong>\u5728\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u4f7f\u7528 <code>SELECT<\/code> \u8a9e\u53e5\u6aa2\u67e5\u5c07\u8981\u522a\u9664\u7684\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9b%9b%e3%80%81%e7%b5%90%e8%ab%96-PmPdhHEfNP\">\u56db\u3001\u7d50\u8ad6<\/h2>\n<p>\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u662f\u4e00\u9805\u9700\u8981\u8b39\u614e\u5c0d\u5f85\u7684\u64cd\u4f5c\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528 SQL \u8a9e\u53e5\u548c\u9075\u5faa\u6700\u4f73\u5be6\u8e10\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u522a\u9664\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\uff0c\u9084\u662f\u6e05\u7a7a\u6574\u500b\u8868\uff0c\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u5eab\u7ba1\u7406\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u522a\u9664\u6578\u64da\u5eab\u6578\u64da\u7684\u65b9\u6cd5\u548c\u6b65\u9a5f\uff0c\u638c\u63e1\u6709\u6548\u7684\u6578\u64da\u7ba1\u7406\u6280\u5de7\uff0c\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u8207\u5b8c\u6574\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-180202","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180202","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=180202"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180202\/revisions"}],"predecessor-version":[{"id":180203,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180202\/revisions\/180203"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}