{"id":152771,"date":"2024-11-02T01:53:17","date_gmt":"2024-11-01T17:53:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152771\/"},"modified":"2024-11-02T01:53:18","modified_gmt":"2024-11-01T17:53:18","slug":"%e5%b8%b8%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%aa%e9%99%a4%e5%91%bd%e4%bb%a4%e5%8f%8a%e4%bd%bf%e7%94%a8%e6%8a%80%e5%b7%a7-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%aa%e9%99%a4%e5%91%bd%e4%bb%a4","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152771\/","title":{"rendered":"\u5e38\u7528\u6578\u64da\u5eab\u522a\u9664\u547d\u4ee4\u53ca\u4f7f\u7528\u6280\u5de7 (\u6578\u64da\u5eab\u522a\u9664\u547d\u4ee4)"},"content":{"rendered":"<h1 id=\"%e5%b8%b8%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%aa%e9%99%a4%e5%91%bd%e4%bb%a4%e5%8f%8a%e4%bd%bf%e7%94%a8%e6%8a%80%e5%b7%a7-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%aa%e9%99%a4%e5%91%bd%e4%bb%a4-JQbTSAfQNp\">\u5e38\u7528\u6578\u64da\u5eab\u522a\u9664\u547d\u4ee4\u53ca\u4f7f\u7528\u6280\u5de7 (\u6578\u64da\u5eab\u522a\u9664\u547d\u4ee4)<\/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\u4e0d\u518d\u9700\u8981\uff0c\u9084\u662f\u56e0\u70ba\u9700\u8981\u6e05\u7406\u904e\u6642\u7684\u4fe1\u606f\uff0c\u6b63\u78ba\u4f7f\u7528\u522a\u9664\u547d\u4ee4\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u5e38\u7528\u7684\u6578\u64da\u5eab\u522a\u9664\u547d\u4ee4\u53ca\u5176\u4f7f\u7528\u6280\u5de7\uff0c\u5e6b\u52a9\u60a8\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"1-sql%e4%b8%ad%e7%9a%84%e5%88%aa%e9%99%a4%e5%91%bd%e4%bb%a4-JQbTSAfQNp\">1. SQL\u4e2d\u7684\u522a\u9664\u547d\u4ee4<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u522a\u9664\u6578\u64da\u7684\u4e3b\u8981\u547d\u4ee4\u662f <code>DELETE<\/code> \u548c <code>TRUNCATE<\/code>\u3002\u9019\u5169\u500b\u547d\u4ee4\u7684\u529f\u80fd\u96d6\u7136\u76f8\u4f3c\uff0c\u4f46\u5728\u4f7f\u7528\u4e0a\u6709\u4e00\u4e9b\u91cd\u8981\u7684\u5340\u5225\u3002<\/p>\n<h3 id=\"1-1-delete-%e5%91%bd%e4%bb%a4-JQbTSAfQNp\">1.1 DELETE \u547d\u4ee4<\/h3>\n<p><code>DELETE<\/code> \u547d\u4ee4\u7528\u65bc\u522a\u9664\u8868\u4e2d\u7684\u7279\u5b9a\u884c\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\u5982\u679c\u60a8\u60f3\u522a\u9664\u540d\u70ba &#8220;users&#8221; \u7684\u8868\u4e2d\u6240\u6709\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &gt; 30;<\/code><\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<code>DELETE<\/code> \u547d\u4ee4\u6703\u8a18\u9304\u6bcf\u4e00\u884c\u7684\u522a\u9664\u64cd\u4f5c\uff0c\u56e0\u6b64\u5728\u522a\u9664\u5927\u91cf\u6578\u64da\u6642\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n<h3 id=\"1-2-truncate-%e5%91%bd%e4%bb%a4-JQbTSAfQNp\">1.2 TRUNCATE \u547d\u4ee4<\/h3>\n<p><code>TRUNCATE<\/code> \u547d\u4ee4\u5247\u7528\u65bc\u5feb\u901f\u522a\u9664\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u4e26\u4e14\u4e0d\u6703\u8a18\u9304\u6bcf\u4e00\u884c\u7684\u522a\u9664\u64cd\u4f5c\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 &#8220;users&#8221; \u8868\u4e2d\u7684\u6240\u6709\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>TRUNCATE TABLE users;<\/code><\/pre>\n<p>\u4f7f\u7528 <code>TRUNCATE<\/code> \u547d\u4ee4\u5f8c\uff0c\u7121\u6cd5\u4f7f\u7528 <code>ROLLBACK<\/code> \u6062\u5fa9\u6578\u64da\uff0c\u56e0\u6b64\u5728\u4f7f\u7528\u6642\u9700\u8b39\u614e\u3002<\/p>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8%e6%8a%80%e5%b7%a7-JQbTSAfQNp\">2. \u4f7f\u7528\u6280\u5de7<\/h2>\n<h3 id=\"2-1-%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99-JQbTSAfQNp\">2.1 \u4f7f\u7528\u4e8b\u52d9<\/h3>\n<p>\u5728\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u6642\uff0c\u5efa\u8b70\u4f7f\u7528\u4e8b\u52d9\u4f86\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u51fa\u73fe\u932f\u8aa4\u6642\u9032\u884c\u56de\u6efe\uff0c\u907f\u514d\u6578\u64da\u640d\u5931\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u4e8b\u52d9\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN TRANSACTION;\nDELETE FROM users WHERE age &gt; 30;\nCOMMIT;<\/code><\/pre>\n<h3 id=\"2-2-%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e9%81%8e%e6%bf%be-JQbTSAfQNp\">2.2 \u4f7f\u7528\u689d\u4ef6\u904e\u6ffe<\/h3>\n<p>\u5728\u4f7f\u7528 <code>DELETE<\/code> \u547d\u4ee4\u6642\uff0c\u52d9\u5fc5\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u4f86\u9650\u5236\u522a\u9664\u7684\u7bc4\u570d\u3002\u82e5\u4e0d\u52a0 <code>WHERE<\/code>\uff0c\u5c07\u6703\u522a\u9664\u6574\u500b\u8868\u7684\u6578\u64da\uff0c\u9019\u662f\u975e\u5e38\u5371\u96aa\u7684\u3002<\/p>\n<h3 id=\"2-3-%e5%ae%9a%e6%9c%9f%e5%82%99%e4%bb%bd-JQbTSAfQNp\">2.3 \u5b9a\u671f\u5099\u4efd<\/h3>\n<p>\u5728\u9032\u884c\u4efb\u4f55\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5b9a\u671f\u5099\u4efd\u6578\u64da\u5eab\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u610f\u5916\u522a\u9664\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\uff0c\u5feb\u901f\u6062\u5fa9\u6578\u64da\u3002<\/p>\n<h2 id=\"3-%e5%b8%b8%e8%a6%8b%e9%8c%af%e8%aa%a4-JQbTSAfQNp\">3. \u5e38\u898b\u932f\u8aa4<\/h2>\n<ul>\n<li><strong>\u5fd8\u8a18\u4f7f\u7528 WHERE \u5b50\u53e5\uff1a<\/strong>\u9019\u662f\u6700\u5e38\u898b\u7684\u932f\u8aa4\u4e4b\u4e00\uff0c\u53ef\u80fd\u5c0e\u81f4\u6574\u500b\u8868\u7684\u6578\u64da\u88ab\u522a\u9664\u3002<\/li>\n<li><strong>\u4e0d\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5728\u522a\u9664\u5927\u91cf\u6578\u64da\u6642\uff0c\u672a\u4f7f\u7528\u4e8b\u52d9\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<li><strong>\u5ffd\u7565\u5099\u4efd\uff1a<\/strong>\u5728\u9032\u884c\u522a\u9664\u64cd\u4f5c\u524d\uff0c\u672a\u5099\u4efd\u6578\u64da\u53ef\u80fd\u5c0e\u81f4\u7121\u6cd5\u6062\u5fa9\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-JQbTSAfQNp\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1\u6578\u64da\u5eab\u7684\u522a\u9664\u547d\u4ee4\u53ca\u5176\u4f7f\u7528\u6280\u5de7\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <code>DELETE<\/code> \u9084\u662f <code>TRUNCATE<\/code>\uff0c\u90fd\u9700\u8981\u8b39\u614e\u64cd\u4f5c\uff0c\u4e26\u9075\u5faa\u6700\u4f73\u5be6\u8e10\u4ee5\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u82e5\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u5eab\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5e38\u7528\u6578\u64da\u5eab\u522a\u9664\u547d\u4ee4\u53ca\u4f7f\u7528\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u8207\u6e96\u78ba\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-152771","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152771","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=152771"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152771\/revisions"}],"predecessor-version":[{"id":152772,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152771\/revisions\/152772"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}