{"id":166401,"date":"2024-11-05T16:09:53","date_gmt":"2024-11-05T08:09:53","guid":{"rendered":"https:\/\/server.hk\/cnblog\/166401\/"},"modified":"2024-11-05T16:09:53","modified_gmt":"2024-11-05T08:09:53","slug":"%e5%bf%ab%e9%80%9f%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%ef%bc%8csql%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-sql%e6%b8%85%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/166401\/","title":{"rendered":"\u5feb\u901f\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\uff0cSQL\u89e3\u6c7a\u65b9\u6848 (sql\u6e05\u9664\u6578\u64da\u5eab\u6578\u64da)"},"content":{"rendered":"<h1 id=\"%e5%bf%ab%e9%80%9f%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%ef%bc%8csql%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-sql%e6%b8%85%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a-AsywUerQgB\">\u5feb\u901f\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\uff0cSQL\u89e3\u6c7a\u65b9\u6848 (sql\u6e05\u9664\u6578\u64da\u5eab\u6578\u64da)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u56e0\u70ba\u6e2c\u8a66\u76ee\u7684\u3001\u6578\u64da\u91cd\u7f6e\uff0c\u9084\u662f\u56e0\u70ba\u9700\u8981\u91cb\u653e\u7a7a\u9593\uff0c\u5feb\u901f\u6709\u6548\u5730\u6e05\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u90fd\u662f\u4e00\u9805\u91cd\u8981\u7684\u6280\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u4f7f\u7528 SQL \u8a9e\u8a00\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%ef%bc%9f-AsywUerQgB\">\u70ba\u4ec0\u9ebc\u9700\u8981\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\uff1f<\/h2>\n<p>\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\u7684\u539f\u56e0\u6709\u5f88\u591a\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u6e2c\u8a66\u74b0\u5883\u91cd\u7f6e\uff1a<\/strong>\u5728\u958b\u767c\u548c\u6e2c\u8a66\u904e\u7a0b\u4e2d\uff0c\u958b\u767c\u8005\u7d93\u5e38\u9700\u8981\u91cd\u7f6e\u6578\u64da\u5eab\uff0c\u4ee5\u4fbf\u9032\u884c\u65b0\u7684\u6e2c\u8a66\u3002<\/li>\n<li><strong>\u6578\u64da\u6e05\u7406\uff1a<\/strong>\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u6578\u64da\u5eab\u4e2d\u53ef\u80fd\u6703\u7a4d\u7d2f\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u6578\u64da\uff0c\u5b9a\u671f\u6e05\u7406\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li><strong>\u6578\u64da\u9077\u79fb\uff1a<\/strong>\u5728\u6578\u64da\u9077\u79fb\u904e\u7a0b\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u6e05\u7a7a\u820a\u6578\u64da\uff0c\u4ee5\u4fbf\u5c0e\u5165\u65b0\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-sql-%e6%b8%85%e7%a9%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95-AsywUerQgB\">\u4f7f\u7528 SQL \u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u6709\u5e7e\u7a2e\u65b9\u6cd5\u53ef\u4ee5\u7528\u4f86\u6e05\u7a7a\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-truncate-%e8%aa%9e%e5%8f%a5-AsywUerQgB\">1. \u4f7f\u7528 TRUNCATE \u8a9e\u53e5<\/h3>\n<p>TRUNCATE \u662f\u4e00\u500b\u5feb\u901f\u7684 SQL \u547d\u4ee4\uff0c\u7528\u65bc\u522a\u9664\u8868\u4e2d\u7684\u6240\u6709\u884c\u3002\u8207 DELETE \u8a9e\u53e5\u76f8\u6bd4\uff0cTRUNCATE \u4e0d\u6703\u9010\u884c\u522a\u9664\uff0c\u800c\u662f\u76f4\u63a5\u91cb\u653e\u6574\u500b\u8868\u7684\u7a7a\u9593\uff0c\u56e0\u6b64\u901f\u5ea6\u66f4\u5feb\u3002<\/p>\n<pre><code>TRUNCATE TABLE \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u8981\u6e05\u7a7a\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>TRUNCATE TABLE users;<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-delete-%e8%aa%9e%e5%8f%a5-AsywUerQgB\">2. \u4f7f\u7528 DELETE \u8a9e\u53e5<\/h3>\n<p>\u5982\u679c\u9700\u8981\u66f4\u7d30\u7dfb\u7684\u63a7\u5236\uff0cDELETE \u8a9e\u53e5\u53ef\u4ee5\u7528\u4f86\u522a\u9664\u8868\u4e2d\u7684\u6578\u64da\u3002\u96d6\u7136 DELETE \u6703\u9010\u884c\u522a\u9664\u6578\u64da\uff0c\u4f46\u5b83\u5141\u8a31\u4f7f\u7528 WHERE \u5b50\u53e5\u4f86\u6307\u5b9a\u522a\u9664\u689d\u4ef6\u3002<\/p>\n<pre><code>DELETE FROM \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u6e05\u7a7a <code>orders<\/code> \u8868\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>DELETE FROM orders;<\/code><\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f7f\u7528 DELETE \u8a9e\u53e5\u6642\uff0c\u6578\u64da\u5eab\u6703\u8a18\u9304\u6bcf\u4e00\u884c\u7684\u522a\u9664\u64cd\u4f5c\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8-drop-%e8%aa%9e%e5%8f%a5-AsywUerQgB\">3. \u4f7f\u7528 DROP \u8a9e\u53e5<\/h3>\n<p>\u5982\u679c\u9700\u8981\u5b8c\u5168\u522a\u9664\u4e00\u500b\u8868\u53ca\u5176\u6240\u6709\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528 DROP \u8a9e\u53e5\u3002\u9019\u5c07\u522a\u9664\u6574\u500b\u8868\u7d50\u69cb\u548c\u6578\u64da\uff0c\u4e26\u4e14\u7121\u6cd5\u6062\u5fa9\u3002<\/p>\n<pre><code>DROP TABLE \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u522a\u9664 <code>products<\/code> \u8868\uff1a<\/p>\n<pre><code>DROP TABLE products;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-AsywUerQgB\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\u4e4b\u524d\uff0c\u61c9\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u52d9\u5fc5\u5099\u4efd\u91cd\u8981\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u4e1f\u5931\u3002<\/li>\n<li><strong>\u6b0a\u9650\u63a7\u5236\uff1a<\/strong>\u78ba\u4fdd\u53ea\u6709\u6388\u6b0a\u7528\u6236\u53ef\u4ee5\u57f7\u884c\u6e05\u7a7a\u6578\u64da\u7684\u64cd\u4f5c\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u640d\u5931\u3002<\/li>\n<li><strong>\u6027\u80fd\u5f71\u97ff\uff1a<\/strong>\u5728\u9ad8\u6d41\u91cf\u7684\u751f\u7522\u74b0\u5883\u4e2d\uff0c\u6e05\u7a7a\u6578\u64da\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u5efa\u8b70\u5728\u4f4e\u5cf0\u6642\u6bb5\u9032\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-AsywUerQgB\">\u7e3d\u7d50<\/h2>\n<p>\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\u662f\u4e00\u9805\u91cd\u8981\u7684\u6578\u64da\u7ba1\u7406\u6280\u80fd\uff0c\u7121\u8ad6\u662f\u4f7f\u7528 <code>TRUNCATE<\/code>\u3001<code>DELETE<\/code> \u9084\u662f <code>DROP<\/code> \u8a9e\u53e5\uff0c\u90fd\u9700\u8981\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u3002\u5728\u9032\u884c\u9019\u4e9b\u64cd\u4f5c\u6642\uff0c\u52d9\u5fc5\u6ce8\u610f\u6578\u64da\u5099\u4efd\u548c\u6b0a\u9650\u63a7\u5236\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u3002\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5eab\u7ba1\u7406\u89e3\u6c7a\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\u64cd\u4f5c\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5feb\u901f\u6e05\u7a7a\u6578\u64da\u5eab\u6578\u64da\u7684SQL\u89e3\u6c7a\u65b9\u6848\uff0c\u7c21\u55ae\u9ad8\u6548\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\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-166401","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166401","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=166401"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166401\/revisions"}],"predecessor-version":[{"id":166402,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166401\/revisions\/166402"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=166401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=166401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=166401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}