{"id":177153,"date":"2024-11-08T13:47:23","date_gmt":"2024-11-08T05:47:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177153\/"},"modified":"2024-11-08T13:47:24","modified_gmt":"2024-11-08T05:47:24","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41066-sql%e7%8b%80%e6%85%8b%ef%bc%9a42000%ef%bc%88er_nonuniq_table%ef%bc%89%e8%a1%a8-%e5%88%a5%e5%90%8d%ef%bc%85s%e4%b8%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177153\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41066 &#8211; SQL\u72c0\u614b\uff1a42000\uff08ER_NONUNIQ_TABLE\uff09\u8868\/\u5225\u540d\u201c\uff05s\u201d\u4e0d\u552f\u4e00"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41066-sql%e7%8b%80%e6%85%8b%ef%bc%9a42000%ef%bc%88er_nonuniq_table%ef%bc%89%e8%a1%a8-%e5%88%a5%e5%90%8d%ef%bc%85s%e4%b8%8d-KmeXNLljcx\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41066 &#8211; SQL\u72c0\u614b\uff1a42000\uff08ER_NONUNIQ_TABLE\uff09\u8868\/\u5225\u540d\u201c\uff05s\u201d\u4e0d\u552f\u4e00<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa41066\uff0c\u8a72\u932f\u8aa4\u7684SQL\u72c0\u614b\u70ba42000\uff0c\u8868\u793a\u8868\u6216\u5225\u540d\u4e0d\u552f\u4e00\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u91cd\u8907\u7684\u8868\u540d\u6216\u5225\u540d\uff0c\u5c0e\u81f4MySQL\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\u67e5\u8a62\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-KmeXNLljcx\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>\u932f\u8aa41066\u7684\u4e3b\u8981\u539f\u56e0\u662fSQL\u67e5\u8a62\u4e2d\u5b58\u5728\u91cd\u8907\u7684\u8868\u540d\u6216\u5225\u540d\u3002\u9019\u53ef\u80fd\u767c\u751f\u5728\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u91cd\u8907\u7684\u8868\u540d\uff1a<\/strong>\u5728JOIN\u64cd\u4f5c\u4e2d\uff0c\u5982\u679c\u591a\u6b21\u5f15\u7528\u540c\u4e00\u500b\u8868\u800c\u6c92\u6709\u4f7f\u7528\u5225\u540d\uff0cMySQL\u5c07\u7121\u6cd5\u78ba\u5b9a\u61c9\u8a72\u4f7f\u7528\u54ea\u4e00\u500b\u8868\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u91cd\u8907\u7684\u5225\u540d\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\uff0c\u5982\u679c\u70ba\u540c\u4e00\u500b\u8868\u6216\u5b50\u67e5\u8a62\u6307\u5b9a\u4e86\u76f8\u540c\u7684\u5225\u540d\uff0c\u5247\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u5b50\u67e5\u8a62\u4e2d\u7684\u91cd\u8907\uff1a<\/strong>\u5728\u4f7f\u7528\u5b50\u67e5\u8a62\u6642\uff0c\u5982\u679c\u5b50\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u8207\u5916\u90e8\u67e5\u8a62\u7684\u8868\u540d\u6216\u5225\u540d\u91cd\u8907\uff0c\u4e5f\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b-KmeXNLljcx\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u53ef\u80fd\u5c0e\u81f4\u932f\u8aa41066\u7684SQL\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT a.id, a.name, b.name \nFROM users AS a \nJOIN users AS b ON a.id = b.referrer_id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u8868\u201cusers\u201d\u88ab\u5f15\u7528\u4e86\u5169\u6b21\uff0c\u5206\u5225\u4f7f\u7528\u4e86\u5225\u540d\u201ca\u201d\u548c\u201cb\u201d\u3002\u5982\u679c\u5728\u67e5\u8a62\u4e2d\u6c92\u6709\u6b63\u78ba\u4f7f\u7528\u5225\u540d\uff0c\u5247\u6703\u5c0e\u81f4\u932f\u8aa41066\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a41066-KmeXNLljcx\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa41066<\/h2>\n<p>\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u958b\u767c\u8005\u9700\u8981\u6aa2\u67e5SQL\u67e5\u8a62\uff0c\u78ba\u4fdd\u6240\u6709\u8868\u540d\u548c\u5225\u540d\u90fd\u662f\u552f\u4e00\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e5%94%af%e4%b8%80%e7%9a%84%e5%88%a5%e5%90%8d-KmeXNLljcx\">1. \u4f7f\u7528\u552f\u4e00\u7684\u5225\u540d<\/h3>\n<p>\u5728\u67e5\u8a62\u4e2d\u70ba\u6bcf\u500b\u8868\u4f7f\u7528\u552f\u4e00\u7684\u5225\u540d\uff0c\u4ee5\u907f\u514d\u6df7\u6dc6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT u1.id, u1.name, u2.name \nFROM users AS u1 \nJOIN users AS u2 ON u1.id = u2.referrer_id;<\/code><\/pre>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5join%e8%aa%9e%e5%8f%a5-KmeXNLljcx\">2. \u6aa2\u67e5JOIN\u8a9e\u53e5<\/h3>\n<p>\u5728\u4f7f\u7528JOIN\u8a9e\u53e5\u6642\uff0c\u78ba\u4fdd\u6bcf\u500b\u8868\u90fd\u88ab\u6b63\u78ba\u5f15\u7528\uff0c\u4e26\u4e14\u6c92\u6709\u91cd\u8907\u7684\u8868\u540d\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT a.id, a.name \nFROM users AS a \nJOIN orders AS b ON a.id = b.user_id;<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e5%ad%90%e6%9f%a5%e8%a9%a2%e6%99%82%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-KmeXNLljcx\">3. \u4f7f\u7528\u5b50\u67e5\u8a62\u6642\u7684\u6ce8\u610f\u4e8b\u9805<\/h3>\n<p>\u5728\u4f7f\u7528\u5b50\u67e5\u8a62\u6642\uff0c\u78ba\u4fdd\u5b50\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u4e0d\u6703\u8207\u5916\u90e8\u67e5\u8a62\u7684\u8868\u540d\u6216\u5225\u540d\u91cd\u8907\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT id, name \nFROM (SELECT id, name FROM users) AS user_data;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-KmeXNLljcx\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa41066\uff08ER_NONUNIQ_TABLE\uff09\u901a\u5e38\u662f\u7531\u65bc\u67e5\u8a62\u4e2d\u5b58\u5728\u91cd\u8907\u7684\u8868\u540d\u6216\u5225\u540d\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5SQL\u67e5\u8a62\u4e26\u78ba\u4fdd\u6240\u6709\u8868\u540d\u548c\u5225\u540d\u90fd\u662f\u552f\u4e00\u7684\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u7ba1\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u652f\u6301\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7ba1\u7406\u5176\u6578\u64da\u5eab\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9MySQL\u932f\u8aa41066\u7684\u65b9\u6cd5\uff0c\u89e3\u6c7aSQL\u72c0\u614b42000\uff08ER_NONUNIQ_TABLE\uff09\u554f\u984c\uff0c\u78ba\u4fdd\u8868\u6216\u5225\u540d\u7684\u552f\u4e00\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-177153","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177153","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=177153"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177153\/revisions"}],"predecessor-version":[{"id":177154,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177153\/revisions\/177154"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}