{"id":2368,"date":"2025-03-04T20:34:18","date_gmt":"2025-03-04T12:34:18","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2368"},"modified":"2025-03-04T20:34:18","modified_gmt":"2025-03-04T12:34:18","slug":"sqlite-truncate-table","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/04\/sqlite-truncate-table\/","title":{"rendered":"SQLite\u00a0Truncate Table"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u5728 SQLite \u4e2d\uff0c\u5e76\u6ca1\u6709\u76f4\u63a5\u7684 <code>TRUNCATE TABLE<\/code> \u547d\u4ee4\uff0c\u50cf\u5176\u4ed6\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08\u5982 MySQL \u6216 PostgreSQL\uff09\u4e2d\u90a3\u6837\u53ef\u4ee5\u4f7f\u7528 <code>TRUNCATE<\/code> \u547d\u4ee4\u6765\u5feb\u901f\u6e05\u7a7a\u8868\u7684\u6570\u636e\u3002\u7136\u800c\uff0c\u4f60\u4ecd\u7136\u53ef\u4ee5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u5b9e\u73b0\u7c7b\u4f3c\u7684\u6548\u679c\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5220\u9664\u6240\u6709\u6570\u636e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u6e05\u7a7a\u4e00\u4e2a\u8868\u7684\u6240\u6709\u6570\u636e\uff0cSQLite \u63d0\u4f9b\u4e86 <code>DELETE<\/code> \u547d\u4ee4\u3002<code>DELETE<\/code> \u547d\u4ee4\u4f1a\u5220\u9664\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u4f46\u5b83\u4e0e <code>TRUNCATE<\/code> \u4e0d\u540c\uff0c\u56e0\u4e3a\u5b83\u4f1a\u9010\u884c\u5220\u9664\uff0c\u5e76\u4e14\u4f1a\u4ea7\u751f\u65e5\u5fd7\uff0c\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM table_name;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM employees;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u547d\u4ee4\u4f1a\u5220\u9664 <code>employees<\/code> \u8868\u4e2d\u7684\u6240\u6709\u6570\u636e\uff0c\u4f46\u662f\u8868\u7684\u7ed3\u6784\u548c\u5b9a\u4e49\uff08\u5217\u3001\u7d22\u5f15\u3001\u7ea6\u675f\u7b49\uff09\u4ecd\u7136\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6027\u80fd\u8003\u8651<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>DELETE<\/code> \u547d\u4ee4<\/strong>\uff1a\u76f8\u5bf9\u4e8e <code>TRUNCATE<\/code>\uff0c<code>DELETE<\/code> \u547d\u4ee4\u66f4\u6162\uff0c\u56e0\u4e3a\u5b83\u9010\u884c\u5220\u9664\u5e76\u4f1a\u4ea7\u751f\u66f4\u591a\u7684\u65e5\u5fd7\u8bb0\u5f55\u3002\u6b64\u5916\uff0c\u5982\u679c\u8868\u4e0a\u6709\u89e6\u53d1\u5668\uff08<code>TRIGGERS<\/code>\uff09\uff0c\u8fd9\u4e9b\u89e6\u53d1\u5668\u4e5f\u4f1a\u88ab\u6267\u884c\u3002<\/li>\n\n\n\n<li><strong><code>TRUNCATE<\/code> \u547d\u4ee4<\/strong>\uff1a\u76f8\u6bd4\u4e4b\u4e0b\uff0c<code>TRUNCATE<\/code> \u4e3b\u8981\u662f\u901a\u8fc7\u5feb\u901f\u5220\u9664\u6240\u6709\u6570\u636e\u800c\u4e0d\u8bb0\u5f55\u9010\u884c\u5220\u9664\u7684\u65e5\u5fd7\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u5220\u9664\u8868\u5e76\u91cd\u65b0\u521b\u5efa<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u5220\u9664\u6574\u4e2a\u8868\u5e76\u91cd\u65b0\u521b\u5efa\u5b83\u3002\u8fd9\u79cd\u65b9\u6cd5\u80fd\u5feb\u901f\u6e05\u7a7a\u8868\u6570\u636e\u5e76\u91ca\u653e\u7a7a\u95f4\uff0c\u4f46\u4f60\u9700\u8981\u91cd\u65b0\u5b9a\u4e49\u8868\u7684\u7ed3\u6784\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6b65\u9aa4<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5220\u9664\u8868\u3002<\/li>\n\n\n\n<li>\u91cd\u65b0\u521b\u5efa\u8868\u3002<\/li>\n\n\n\n<li>\uff08\u53ef\u9009\uff09\u91cd\u65b0\u63d2\u5165\u5fc5\u8981\u7684\u521d\u59cb\u6570\u636e\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DROP TABLE IF EXISTS employees;\nCREATE TABLE employees (\n    id INTEGER PRIMARY KEY,\n    first_name TEXT,\n    last_name TEXT\n);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u65b9\u6cd5\u867d\u7136\u80fd\u5b9e\u73b0\u6e05\u7a7a\u8868\u7684\u6548\u679c\uff0c\u4f46\u4f1a\u5220\u9664\u8868\u7ed3\u6784\u3001\u7d22\u5f15\u7b49\uff0c\u56e0\u6b64\u5b83\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u4e0d\u662f\u6700\u4f73\u9009\u62e9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u6e05\u7a7a\u8868\u7684\u4f18\u5316\u65b9\u6cd5\uff1a<code>VACUUM<\/code><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4f7f\u7528 <code>DELETE<\/code> \u547d\u4ee4\u6e05\u7a7a\u8868\u4e4b\u540e\uff0cSQLite \u4ecd\u7136\u4f1a\u4fdd\u7559\u5df2\u7ecf\u5220\u9664\u7684\u7a7a\u95f4\u3002\u5982\u679c\u4f60\u60f3\u56de\u6536\u8fd9\u4e9b\u7a7a\u95f4\u5e76\u4f18\u5316\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>VACUUM<\/code> \u547d\u4ee4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bed\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>VACUUM;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>VACUUM<\/code> \u4f1a\u91cd\u65b0\u7ec4\u7ec7\u6570\u636e\u5e93\uff0c\u91ca\u653e\u6240\u6709\u4e0d\u518d\u4f7f\u7528\u7684\u7a7a\u95f4\uff0c\u5e76\u5c06\u6570\u636e\u5e93\u6587\u4ef6\u538b\u7f29\u5230\u6700\u5c0f\u5927\u5c0f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u867d\u7136 SQLite \u6ca1\u6709 <code>TRUNCATE TABLE<\/code> \u547d\u4ee4\uff0c\u4f46\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>DELETE<\/code> \u6765\u6e05\u7a7a\u8868\u6570\u636e\u3002\u82e5\u8981\u63d0\u9ad8\u6027\u80fd\uff0c\u907f\u514d\u9010\u884c\u5220\u9664\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u5220\u9664\u8868\u5e76\u91cd\u65b0\u521b\u5efa\u5b83\uff0c\u6216\u8005\u4f7f\u7528 <code>VACUUM<\/code> \u6765\u4f18\u5316\u6570\u636e\u5e93\u3002\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 SQLite \u4e2d\uff0c\u5e76\u6ca1\u6709\u76f4\u63a5\u7684 TRUNCATE TABLE \u547d\u4ee4\uff0c\u50cf\u5176\u4ed6\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08\u5982 MySQL  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[],"class_list":["post-2368","post","type-post","status-publish","format-standard","hentry","category-sqlite"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2368","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2368"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2368\/revisions"}],"predecessor-version":[{"id":2369,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2368\/revisions\/2369"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}