{"id":51593,"date":"2025-08-11T00:54:17","date_gmt":"2025-08-10T16:54:17","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51593.html"},"modified":"2025-08-11T00:54:17","modified_gmt":"2025-08-10T16:54:17","slug":"sql%e4%b8%89%e5%89%91%e5%ae%a2%ef%bc%9adelete%e3%80%81truncate%e3%80%81drop%e5%85%a8%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51593.html","title":{"rendered":"SQL\u4e09\u5251\u5ba2\uff1aDELETE\u3001TRUNCATE\u3001DROP\u5168\u89e3\u6790"},"content":{"rendered":"<p>\u5728 SQL \u7f16\u7a0b\u4e2d&#xff0c;DROP\u3001DELETE \u548c TRUNCATE \u90fd\u662f\u6570\u636e\u64cd\u4f5c\u547d\u4ee4&#xff0c;\u4f46\u5b83\u4eec\u7684\u529f\u80fd\u548c\u884c\u4e3a\u6709\u672c\u8d28\u533a\u522b&#xff1a;<\/p>\n<hr \/>\n<h4>1. DELETE<\/h4>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u5220\u9664\u8868\u4e2d \u6ee1\u8db3\u6761\u4ef6\u7684\u884c&#xff08;\u53ef\u6307\u5b9a WHERE \u5b50\u53e5&#xff09;<\/li>\n<li>\u6027\u8d28&#xff1a;\u6570\u636e\u64cd\u4f5c\u8bed\u8a00&#xff08;DML&#xff09;<\/li>\n<li>\u4e8b\u52a1&#xff1a;\n<ul>\n<li>\u8bb0\u5f55\u65e5\u5fd7&#xff08;\u6bcf\u5220\u9664\u4e00\u884c\u90fd\u8bb0\u65e5\u5fd7&#xff09;<\/li>\n<li>\u652f\u6301\u4e8b\u52a1\u56de\u6eda&#xff08;ROLLBACK&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u9501\u673a\u5236&#xff1a;\u884c\u7ea7\u9501&#xff08;\u9501\u5b9a\u88ab\u5220\u9664\u7684\u884c&#xff09;<\/li>\n<li>\u81ea\u589e\u5217&#xff1a;\u4e0d\u91cd\u7f6e\u81ea\u589e\u8ba1\u6570\u5668&#xff08;\u5982 IDENTITY \u6216 AUTO_INCREMENT&#xff09;<\/li>\n<li>\u6027\u80fd&#xff1a;\u5220\u9664\u5927\u91cf\u6570\u636e\u65f6\u8f83\u6162&#xff08;\u9010\u884c\u64cd\u4f5c&#xff09;<\/li>\n<li>\u8bed\u6cd5\u793a\u4f8b&#xff1a;<span class=\"token keyword\">DELETE<\/span> <span class=\"token keyword\">FROM<\/span> table_name <span class=\"token keyword\">WHERE<\/span> condition<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">&#8212; \u5220\u9664\u7279\u5b9a\u884c<\/span><br \/>\n<span class=\"token keyword\">DELETE<\/span> <span class=\"token keyword\">FROM<\/span> table_name<span class=\"token punctuation\">;<\/span>                   <span class=\"token comment\">&#8212; \u5220\u9664\u6240\u6709\u884c&#xff08;\u4fdd\u7559\u8868\u7ed3\u6784&#xff09;<\/span><\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>2. TRUNCATE<\/h4>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u5feb\u901f\u6e05\u7a7a\u6574\u4e2a\u8868\u7684\u6240\u6709\u6570\u636e<\/li>\n<li>\u6027\u8d28&#xff1a;\u6570\u636e\u5b9a\u4e49\u8bed\u8a00&#xff08;DDL&#xff09;<\/li>\n<li>\u4e8b\u52a1&#xff1a;\n<ul>\n<li>\u6700\u5c0f\u5316\u65e5\u5fd7&#xff08;\u53ea\u8bb0\u5f55\u9875\u91ca\u653e&#xff0c;\u4e0d\u8bb0\u6bcf\u884c&#xff09;<\/li>\n<li>\u591a\u6570\u6570\u636e\u5e93\u4e0d\u53ef\u56de\u6eda&#xff08;\u4f46 SQL Server \u7b49\u652f\u6301\u4e8b\u52a1\u5185\u56de\u6eda&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u9501\u673a\u5236&#xff1a;\u8868\u7ea7\u9501&#xff08;\u9501\u5b9a\u6574\u4e2a\u8868&#xff09;<\/li>\n<li>\u81ea\u589e\u5217&#xff1a;\u91cd\u7f6e\u81ea\u589e\u8ba1\u6570\u5668&#xff08;\u4ece\u521d\u59cb\u503c\u5f00\u59cb&#xff09;<\/li>\n<li>\u6027\u80fd&#xff1a;\u6781\u5feb&#xff08;\u76f4\u63a5\u91ca\u653e\u6570\u636e\u9875&#xff0c;\u4e0d\u626b\u63cf\u884c&#xff09;<\/li>\n<li>\u9650\u5236&#xff1a;\n<ul>\n<li>\u4e0d\u80fd\u5e26 WHERE \u5b50\u53e5<\/li>\n<li>\u6709\u5916\u952e\u5f15\u7528\u65f6\u53ef\u80fd\u5931\u8d25<\/li>\n<\/ul>\n<\/li>\n<li>\u8bed\u6cd5\u793a\u4f8b&#xff1a;<span class=\"token keyword\">TRUNCATE<\/span> <span class=\"token keyword\">TABLE<\/span> table_name<span class=\"token punctuation\">;<\/span>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>3. DROP<\/h4>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u6c38\u4e45\u5220\u9664\u6574\u4e2a\u8868&#xff08;\u7ed3\u6784 &#043; \u6570\u636e &#043; \u6743\u9650 &#043; \u7d22\u5f15&#xff09;<\/li>\n<li>\u6027\u8d28&#xff1a;\u6570\u636e\u5b9a\u4e49\u8bed\u8a00&#xff08;DDL&#xff09;<\/li>\n<li>\u4e8b\u52a1&#xff1a;\n<ul>\n<li>\u64cd\u4f5c\u7acb\u5373\u751f\u6548&#xff08;\u9690\u5f0f\u63d0\u4ea4\u4e8b\u52a1&#xff09;<\/li>\n<li>\u4e0d\u53ef\u56de\u6eda<\/li>\n<\/ul>\n<\/li>\n<li>\u9501\u673a\u5236&#xff1a;\u8868\u7ea7\u9501<\/li>\n<li>\u7ed3\u679c&#xff1a;\u8868\u4ece\u6570\u636e\u5e93\u4e2d\u5b8c\u5168\u6d88\u5931&#xff08;\u9700\u91cd\u5efa\u624d\u80fd\u4f7f\u7528&#xff09;<\/li>\n<li>\u6027\u80fd&#xff1a;\u5feb&#xff08;\u76f4\u63a5\u5220\u9664\u5143\u6570\u636e\u548c\u6570\u636e\u9875&#xff09;<\/li>\n<li>\u8bed\u6cd5\u793a\u4f8b&#xff1a;<span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">TABLE<\/span> table_name<span class=\"token punctuation\">;<\/span>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>\u6838\u5fc3\u533a\u522b\u603b\u7ed3<\/h4>\n<table>\n<tr>\u7279\u6027DELETETRUNCATEDROP<\/tr>\n<tbody>\n<tr>\n<td>\u5220\u9664\u5bf9\u8c61<\/td>\n<td>\u884c\u6570\u636e<\/td>\n<td>\u6240\u6709\u884c\u6570\u636e<\/td>\n<td>\u8868\u7ed3\u6784 &#043; \u6570\u636e<\/td>\n<\/tr>\n<tr>\n<td>\u662f\u5426\u4fdd\u7559\u8868\u7ed3\u6784<\/td>\n<td>\u662f<\/td>\n<td>\u662f<\/td>\n<td>\u5426<\/td>\n<\/tr>\n<tr>\n<td>WHERE \u6761\u4ef6<\/td>\n<td>\u652f\u6301<\/td>\n<td>\u4e0d\u652f\u6301<\/td>\n<td>\u4e0d\u652f\u6301<\/td>\n<\/tr>\n<tr>\n<td>\u65e5\u5fd7\u8bb0\u5f55<\/td>\n<td>\u8be6\u7ec6&#xff08;\u6bcf\u884c&#xff09;<\/td>\n<td>\u5c11\u91cf&#xff08;\u9875\u91ca\u653e&#xff09;<\/td>\n<td>\u5c11\u91cf&#xff08;\u5143\u6570\u636e&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u4e8b\u52a1\u56de\u6eda<\/td>\n<td>\u652f\u6301<\/td>\n<td>\u591a\u6570\u4e0d\u652f\u6301<\/td>\n<td>\u4e0d\u652f\u6301<\/td>\n<\/tr>\n<tr>\n<td>\u81ea\u589e\u5217\u91cd\u7f6e<\/td>\n<td>\u5426<\/td>\n<td>\u662f<\/td>\n<td>\u8868\u5df2\u4e0d\u5b58\u5728<\/td>\n<\/tr>\n<tr>\n<td>\u6267\u884c\u901f\u5ea6<\/td>\n<td>\u6162&#xff08;\u9010\u884c&#xff09;<\/td>\n<td>\u5feb&#xff08;\u76f4\u63a5\u91ca\u653e\u6570\u636e\u9875&#xff09;<\/td>\n<td>\u6700\u5feb&#xff08;\u5220\u9664\u5143\u6570\u636e&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u89e6\u53d1\u89e6\u53d1\u5668<\/td>\n<td>\u662f&#xff08;\u89e6\u53d1 DELETE \u89e6\u53d1\u5668&#xff09;<\/td>\n<td>\u5426&#xff08;\u901a\u5e38\u4e0d\u89e6\u53d1&#xff09;<\/td>\n<td>\u5426<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u4f7f\u7528\u573a\u666f\u5efa\u8bae<\/h4>\n<li>\u5220\u9664\u7279\u5b9a\u884c \u2192 DELETE &#043; WHERE<span class=\"token keyword\">DELETE<\/span> <span class=\"token keyword\">FROM<\/span> orders <span class=\"token keyword\">WHERE<\/span> <span class=\"token keyword\">status<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;cancelled&#039;<\/span><span class=\"token punctuation\">;<\/span>\n<\/li>\n<li>\u5feb\u901f\u6e05\u7a7a\u5927\u8868 \u2192 TRUNCATE<span class=\"token keyword\">TRUNCATE<\/span> <span class=\"token keyword\">TABLE<\/span> temp_logs<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">&#8212; \u6e05\u7a7a\u65e5\u5fd7\u8868<\/span>\n<\/li>\n<li>\u5f7b\u5e95\u5220\u9664\u8868&#xff08;\u5305\u62ec\u7ed3\u6784&#xff09; \u2192 DROP<span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">TABLE<\/span> obsolete_data<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">&#8212; \u5220\u9664\u65e0\u7528\u8868<\/span>\n<\/li>\n<hr \/>\n<h4>\u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>\u5916\u952e\u7ea6\u675f&#xff1a;<br \/>\nTRUNCATE \u548c DROP \u53ef\u80fd\u56e0\u5916\u952e\u5f15\u7528\u5931\u8d25&#xff0c;\u9700\u5148\u5904\u7406\u7ea6\u675f\u3002<\/li>\n<li>\u6743\u9650\u8981\u6c42&#xff1a;\n<ul>\n<li>DELETE \u9700\u8981 DELETE \u6743\u9650<\/li>\n<li>TRUNCATE \u901a\u5e38\u9700\u8981 ALTER \u6743\u9650<\/li>\n<li>DROP \u9700\u8981 DROP \u6743\u9650<\/li>\n<\/ul>\n<\/li>\n<li>\u6062\u590d\u96be\u5ea6&#xff1a;<br \/>\nDROP \u64cd\u4f5c\u540e\u6570\u636e\u6700\u96be\u6062\u590d&#xff08;\u9700\u4ece\u5907\u4efd\u8fd8\u539f&#xff09;&#xff0c;DELETE \u53ef\u901a\u8fc7\u4e8b\u52a1\u65e5\u5fd7\u6062\u590d\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb172\u6b21\u3002SQL \u4e2d DELETE\u3001TRUNCATE \u548c DROP \u7684\u533a\u522b\uff1a DELETE\uff1a\u9010\u884c\u5220\u9664\u6570\u636e\uff08\u652f\u6301\u6761\u4ef6\uff09\uff0c\u53ef\u56de\u6eda\uff0c\u4fdd\u7559\u8868\u7ed3\u6784\uff0c\u6027\u80fd\u8f83\u6162\u3002 TRUNCATE\uff1a\u5feb\u901f\u6e05\u7a7a\u5168\u8868\uff08\u4e0d\u53ef\u56de\u6eda\uff09\uff0c\u91cd\u7f6e\u81ea\u589e\u5217\uff0c\u6027\u80fd\u5feb\u3002 DROP\uff1a\u5f7b\u5e95\u5220\u9664\u8868\uff08\u7ed3\u6784+\u6570\u636e\uff09\uff0c\u4e0d\u53ef\u6062\u590d\u3002 \u9002\u7528\u573a\u666f\uff1a \u5220\u90e8\u5206\u6570\u636e\u7528 DELETE \u5feb\u901f\u6e05\u7a7a\u8868\u7528 TRUNCATE \u5f7b\u5e95\u5220\u9664\u8868\u7528 DROP \u6ce8\u610f\uff1aTRUNCATE \u548c DROP \u9700\u66f4\u9ad8\u6743\u9650\uff0c\u4e14\u53ef\u80fd\u53d7\u5916\u952e\u7ea6\u675f\u9650\u5236\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,768,100],"topic":[],"class_list":["post-51593","post","type-post","status-publish","format-standard","hentry","category-server","tag-java","tag-sql","tag-100"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SQL\u4e09\u5251\u5ba2\uff1aDELETE\u3001TRUNCATE\u3001DROP\u5168\u89e3\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/51593.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta 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