{"id":178990,"date":"2024-11-08T22:05:25","date_gmt":"2024-11-08T14:05:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178990\/"},"modified":"2024-11-08T22:05:26","modified_gmt":"2024-11-08T14:05:26","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-postgresql-%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a42702-ambiguous_column%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178990\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 &#8211; ambiguous_column\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-postgresql-%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a42702-ambiguous_column%ef%bc%9f-vxfBQPIQmm\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 &#8211; ambiguous_column\uff1f<\/h1>\n<p>\u5728\u4f7f\u7528 PostgreSQL \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc 42702\uff0c\u9019\u8868\u793a\u300c\u6a21\u7cca\u7684\u5217\u540d\u300d\uff08ambiguous column\uff09\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u591a\u500b\u8868\uff0c\u4e26\u4e14\u5728\u9019\u4e9b\u8868\u4e2d\u5b58\u5728\u540c\u540d\u7684\u5217\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u6210\u56e0\u3001\u5982\u4f55\u4fee\u5fa9\u5b83\uff0c\u4ee5\u53ca\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff0c\u4ee5\u907f\u514d\u672a\u4f86\u518d\u6b21\u51fa\u73fe\u985e\u4f3c\u554f\u984c\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-42702-%e7%9a%84%e6%88%90%e5%9b%a0-vxfBQPIQmm\">\u932f\u8aa4\u4ee3\u78bc 42702 \u7684\u6210\u56e0<\/h2>\n<p>\u7576\u4f60\u5728 SQL \u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u591a\u500b\u8868\uff0c\u4e26\u4e14\u9019\u4e9b\u8868\u4e2d\u6709\u76f8\u540c\u540d\u7a31\u7684\u5217\u6642\uff0cPostgreSQL \u6703\u7121\u6cd5\u78ba\u5b9a\u4f60\u6240\u6307\u7684\u5177\u9ad4\u5217\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa4 42702\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528 JOIN \u8a9e\u53e5\u6642\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT name FROM users JOIN orders ON users.id = orders.user_id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u5982\u679c <code>users<\/code> \u548c <code>orders<\/code> \u8868\u4e2d\u90fd\u6709\u4e00\u500b\u540d\u70ba <code>name<\/code> \u7684\u5217\uff0cPostgreSQL \u5c07\u7121\u6cd5\u78ba\u5b9a\u4f60\u60f3\u8981\u5f9e\u54ea\u500b\u8868\u4e2d\u9078\u64c7 <code>name<\/code> \u5217\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4-42702-vxfBQPIQmm\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4 42702<\/h2>\n<p>\u8981\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\uff0c\u6700\u7c21\u55ae\u7684\u65b9\u6cd5\u662f\u660e\u78ba\u6307\u5b9a\u4f60\u60f3\u8981\u9078\u64c7\u7684\u5217\u6240\u5c6c\u7684\u8868\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728\u5217\u540d\u524d\u52a0\u4e0a\u8868\u540d\u6216\u8868\u7684\u5225\u540d\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT users.name FROM users JOIN orders ON users.id = orders.user_id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4fee\u6b63\u7684\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u660e\u78ba\u6307\u5b9a\u4e86 <code>users<\/code> \u8868\u4e2d\u7684 <code>name<\/code> \u5217\uff0c\u9019\u6a23 PostgreSQL \u5c31\u80fd\u6b63\u78ba\u8b58\u5225\u4f60\u6240\u6307\u7684\u5217\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u6a21\u7cca\u6027\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%88%a5%e5%90%8d%e4%be%86%e7%b0%a1%e5%8c%96%e6%9f%a5%e8%a9%a2-vxfBQPIQmm\">\u4f7f\u7528\u5225\u540d\u4f86\u7c21\u5316\u67e5\u8a62<\/h2>\n<p>\u5728\u8907\u96dc\u7684\u67e5\u8a62\u4e2d\uff0c\u4f7f\u7528\u5225\u540d\u53ef\u4ee5\u4f7f\u67e5\u8a62\u66f4\u5177\u53ef\u8b80\u6027\uff0c\u4e26\u4e14\u6709\u52a9\u65bc\u907f\u514d\u6a21\u7cca\u5217\u540d\u7684\u554f\u984c\u3002\u4f60\u53ef\u4ee5\u70ba\u8868\u6307\u5b9a\u5225\u540d\uff0c\u7136\u5f8c\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u9019\u4e9b\u5225\u540d\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT u.name FROM users AS u JOIN orders AS o ON u.id = o.user_id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u70ba <code>users<\/code> \u8868\u6307\u5b9a\u4e86\u5225\u540d <code>u<\/code>\uff0c\u70ba <code>orders<\/code> \u8868\u6307\u5b9a\u4e86\u5225\u540d <code>o<\/code>\u3002\u9019\u6a23\u4e0d\u50c5\u4f7f\u67e5\u8a62\u66f4\u7c21\u6f54\uff0c\u9084\u80fd\u6709\u6548\u907f\u514d\u6a21\u7cca\u5217\u540d\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-vxfBQPIQmm\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u59cb\u7d42\u4f7f\u7528\u8868\u540d\u6216\u5225\u540d\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u8868\u540d\u6216\u5225\u540d\u4f86\u660e\u78ba\u6307\u5b9a\u5217\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u8868\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li><strong>\u907f\u514d\u4f7f\u7528\u901a\u7528\u5217\u540d\uff1a<\/strong>\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u76e1\u91cf\u907f\u514d\u4f7f\u7528\u901a\u7528\u7684\u5217\u540d\uff0c\u5982 <code>name<\/code>\u3001<code>date<\/code> \u7b49\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6a21\u7cca\u6027\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u67e5\u8a62\uff1a<\/strong>\u5728\u57f7\u884c\u67e5\u8a62\u4e4b\u524d\uff0c\u53ef\u4ee5\u5148\u5728\u958b\u767c\u74b0\u5883\u4e2d\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u4e0d\u6703\u51fa\u73fe\u6a21\u7cca\u5217\u540d\u7684\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-vxfBQPIQmm\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42702 &#8211; ambiguous_column \u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u901a\u5e38\u7531\u65bc\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u591a\u500b\u8868\u4e14\u5b58\u5728\u540c\u540d\u5217\u6240\u5f15\u8d77\u3002\u901a\u904e\u660e\u78ba\u6307\u5b9a\u5217\u7684\u4f86\u6e90\uff0c\u4f7f\u7528\u5225\u540d\uff0c\u4ee5\u53ca\u9075\u5faa\u6700\u4f73\u5be6\u8e10\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\u4e26\u907f\u514d\u672a\u4f86\u7684\u554f\u984c\u3002\u5982\u679c\u4f60\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u652f\u6301\u4f60\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u5eab\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42702 &#8211; ambiguous_column\uff0c\u89e3\u6c7a\u67e5\u8a62\u4e2d\u5217\u540d\u6a21\u7cca\u7684\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\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-178990","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178990","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=178990"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178990\/revisions"}],"predecessor-version":[{"id":178991,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178990\/revisions\/178991"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178990"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178990"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}