{"id":173551,"date":"2024-11-07T18:58:19","date_gmt":"2024-11-07T10:58:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173551\/"},"modified":"2024-11-07T18:58:19","modified_gmt":"2024-11-07T10:58:19","slug":"%e5%a6%82%e4%bd%95%e6%aa%a2%e6%b8%ac%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%ef%bc%9f-%e6%aa%a2%e6%b8%ac%e6%98%af%e5%90%a6%e9%87%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173551\/","title":{"rendered":"\u5982\u4f55\u6aa2\u6e2c\u6578\u64da\u5eab\u4e2d\u662f\u5426\u5b58\u5728\u91cd\u8907\u6578\u64da\uff1f (\u6aa2\u6e2c\u662f\u5426\u91cd\u8907\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e6%aa%a2%e6%b8%ac%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%ef%bc%9f-ZyBAEzcTfK\">\u5982\u4f55\u6aa2\u6e2c\u6578\u64da\u5eab\u4e2d\u662f\u5426\u5b58\u5728\u91cd\u8907\u6578\u64da\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u91cd\u8907\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6027\u3001\u6027\u80fd\u4e0b\u964d\u4ee5\u53ca\u5b58\u5132\u7a7a\u9593\u7684\u6d6a\u8cbb\u3002\u56e0\u6b64\uff0c\u6aa2\u6e2c\u548c\u6e05\u7406\u91cd\u8907\u6578\u64da\u662f\u78ba\u4fdd\u6578\u64da\u5eab\u5065\u5eb7\u904b\u884c\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u6709\u6548\u5730\u6aa2\u6e2c\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%e7%9a%84%e5%ae%9a%e7%be%a9-ZyBAEzcTfK\">\u91cd\u8907\u6578\u64da\u7684\u5b9a\u7fa9<\/h2>\n<p>\u91cd\u8907\u6578\u64da\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5728\u591a\u689d\u76f8\u540c\u6216\u76f8\u4f3c\u7684\u8a18\u9304\u3002\u9019\u4e9b\u91cd\u8907\u7684\u8a18\u9304\u53ef\u80fd\u662f\u7531\u65bc\u591a\u6b21\u8f38\u5165\u76f8\u540c\u6578\u64da\u3001\u6578\u64da\u5c0e\u5165\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\u6216\u7cfb\u7d71\u6574\u5408\u6642\u7684\u6578\u64da\u885d\u7a81\u6240\u9020\u6210\u7684\u3002\u91cd\u8907\u6578\u64da\u4e0d\u50c5\u6703\u5f71\u97ff\u67e5\u8a62\u6548\u7387\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u5831\u544a\u548c\u5206\u6790\u7d50\u679c\u7684\u4e0d\u6e96\u78ba\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e6%b8%ac%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95-ZyBAEzcTfK\">\u6aa2\u6e2c\u91cd\u8907\u6578\u64da\u7684\u65b9\u6cd5<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-sql-%e6%9f%a5%e8%a9%a2-ZyBAEzcTfK\">1. \u4f7f\u7528 SQL \u67e5\u8a62<\/h3>\n<p>\u6700\u5e38\u898b\u7684\u6aa2\u6e2c\u91cd\u8907\u6578\u64da\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 SQL \u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u67e5\u627e\u67d0\u500b\u8868\u4e2d\u91cd\u8907\u7684\u8a18\u9304\uff1a<\/p>\n<pre><code>SELECT column_name, COUNT(*)\nFROM table_name\nGROUP BY column_name\nHAVING COUNT(*) &gt; 1;<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u60a8\u9700\u8981\u5c07 <code>column_name<\/code> \u66ff\u63db\u70ba\u60a8\u8981\u6aa2\u67e5\u7684\u5217\u540d\uff0c<code>table_name<\/code> \u66ff\u63db\u70ba\u60a8\u7684\u8868\u540d\u3002\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u91cd\u8907\u7684\u8a18\u9304\u53ca\u5176\u51fa\u73fe\u7684\u6b21\u6578\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-distinct-%e9%97%9c%e9%8d%b5%e5%ad%97-ZyBAEzcTfK\">2. \u4f7f\u7528 DISTINCT \u95dc\u9375\u5b57<\/h3>\n<p>\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u4f7f\u7528 <code>DISTINCT<\/code> \u95dc\u9375\u5b57\u4f86\u67e5\u627e\u552f\u4e00\u7684\u8a18\u9304\uff0c\u7136\u5f8c\u8207\u539f\u59cb\u8a18\u9304\u9032\u884c\u6bd4\u8f03\uff1a<\/p>\n<pre><code>SELECT DISTINCT column_name\nFROM table_name;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u7372\u5f97\u4e0d\u91cd\u8907\u7684\u8a18\u9304\uff0c\u7136\u5f8c\u60a8\u53ef\u4ee5\u624b\u52d5\u6216\u901a\u904e\u5176\u4ed6\u67e5\u8a62\u4f86\u6aa2\u67e5\u91cd\u8907\u7684\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e7%ae%a1%e7%90%86%e5%b7%a5%e5%85%b7-ZyBAEzcTfK\">3. \u4f7f\u7528\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177<\/h3>\n<p>\u8a31\u591a\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\uff08\u5982 phpMyAdmin\u3001Navicat \u7b49\uff09\u63d0\u4f9b\u4e86\u53ef\u8996\u5316\u7684\u754c\u9762\u4f86\u6aa2\u6e2c\u91cd\u8907\u6578\u64da\u3002\u9019\u4e9b\u5de5\u5177\u901a\u5e38\u6703\u63d0\u4f9b\u5831\u544a\u529f\u80fd\uff0c\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u8b58\u5225\u91cd\u8907\u7684\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e6%b8%85%e7%90%86%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95-ZyBAEzcTfK\">\u6e05\u7406\u91cd\u8907\u6578\u64da\u7684\u65b9\u6cd5<\/h2>\n<p>\u6aa2\u6e2c\u5230\u91cd\u8907\u6578\u64da\u5f8c\uff0c\u6e05\u7406\u9019\u4e9b\u6578\u64da\u662f\u4e0b\u4e00\u6b65\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6e05\u7406\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><strong>\u522a\u9664\u91cd\u8907\u8a18\u9304\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528 SQL \u7684 <code>DELETE<\/code> \u8a9e\u53e5\u4f86\u522a\u9664\u91cd\u8907\u7684\u8a18\u9304\uff0c\u901a\u5e38\u9700\u8981\u5148\u78ba\u5b9a\u8981\u4fdd\u7559\u7684\u8a18\u9304\u3002<\/li>\n<li><strong>\u5408\u4f75\u91cd\u8907\u8a18\u9304\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5408\u4f75\u91cd\u8907\u7684\u8a18\u9304\uff0c\u4ee5\u4fdd\u7559\u6240\u6709\u76f8\u95dc\u4fe1\u606f\u3002<\/li>\n<li><strong>\u8a2d\u7f6e\u552f\u4e00\u7d04\u675f\uff1a<\/strong>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u968e\u6bb5\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u552f\u4e00\u7d04\u675f\u4f86\u9632\u6b62\u672a\u4f86\u7684\u91cd\u8907\u6578\u64da\u8f38\u5165\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-ZyBAEzcTfK\">\u7d50\u8ad6<\/h2>\n<p>\u6aa2\u6e2c\u548c\u6e05\u7406\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\u662f\u6578\u64da\u7ba1\u7406\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u4f7f\u7528 SQL \u67e5\u8a62\u3001\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\u4ee5\u53ca\u8a2d\u7f6e\u552f\u4e00\u7d04\u675f\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u8b58\u5225\u548c\u8655\u7406\u91cd\u8907\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u61c9\u5c0d\u6578\u64da\u7ba1\u7406\u6311\u6230\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u6aa2\u6e2c\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\uff0c\u638c\u63e1\u6709\u6548\u7684\u65b9\u6cd5\u548c\u5de5\u5177\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\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-173551","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173551","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=173551"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173551\/revisions"}],"predecessor-version":[{"id":173552,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173551\/revisions\/173552"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}