{"id":178988,"date":"2024-11-08T22:04:21","date_gmt":"2024-11-08T14:04:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178988\/"},"modified":"2024-11-08T22:04:23","modified_gmt":"2024-11-08T14:04:23","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%9a42701-duplicate_column%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178988\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42701 &#8211; duplicate_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%9a42701-duplicate_column%ef%bc%9f-VBfKcknOIn\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42701 &#8211; duplicate_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 42701\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u8868\u793a\u5728\u5275\u5efa\u6216\u4fee\u6539\u8868\u6642\u51fa\u73fe\u4e86\u91cd\u8907\u7684\u5217\u540d\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-42701-%e7%9a%84%e5%8e%9f%e5%9b%a0-VBfKcknOIn\">\u932f\u8aa4\u4ee3\u78bc 42701 \u7684\u539f\u56e0<\/h2>\n<p>PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42701 \u7684\u5177\u9ad4\u542b\u7fa9\u662f\u300cduplicate_column\u300d\uff0c\u5373\u91cd\u8907\u7684\u5217\u540d\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u5275\u5efa\u8868\u6642\uff1a<\/strong>\u7576\u4f60\u5617\u8a66\u5275\u5efa\u4e00\u500b\u65b0\u8868\u4e26\u4e14\u5728\u5217\u5b9a\u7fa9\u4e2d\u4f7f\u7528\u4e86\u76f8\u540c\u7684\u5217\u540d\u6642\uff0c\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u4fee\u6539\u8868\u7d50\u69cb\u6642\uff1a<\/strong>\u5728\u4f7f\u7528 ALTER TABLE \u8a9e\u53e5\u6dfb\u52a0\u65b0\u5217\u6642\uff0c\u5982\u679c\u65b0\u5217\u7684\u540d\u7a31\u8207\u73fe\u6709\u5217\u91cd\u8907\uff0c\u4e5f\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u8907\u88fd\u8868\u7d50\u69cb\uff1a<\/strong>\u5728\u4f7f\u7528 CREATE TABLE &#8230; AS SELECT \u8a9e\u53e5\u6642\uff0c\u5982\u679c\u9078\u64c7\u7684\u5217\u4e2d\u6709\u91cd\u8907\u7684\u5217\u540d\uff0c\u5247\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4-42701-VBfKcknOIn\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4 42701<\/h2>\n<p>\u4fee\u5fa9 PostgreSQL \u932f\u8aa4 42701 \u7684\u65b9\u6cd5\u53d6\u6c7a\u65bc\u5177\u9ad4\u7684\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e5%88%97%e5%90%8d-VBfKcknOIn\">1. \u6aa2\u67e5\u5217\u540d<\/h3>\n<p>\u5728\u5275\u5efa\u6216\u4fee\u6539\u8868\u4e4b\u524d\uff0c\u9996\u5148\u6aa2\u67e5\u4f60\u6240\u4f7f\u7528\u7684\u5217\u540d\u662f\u5426\u6709\u91cd\u8907\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u67e5\u770b\u8868\u7684\u7d50\u69cb\uff1a<\/p>\n<pre><code>SELECT column_name \nFROM information_schema.columns \nWHERE table_name = 'your_table_name';<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5217\u51fa\u6240\u6709\u5217\u540d\uff0c\u5e6b\u52a9\u4f60\u8b58\u5225\u91cd\u8907\u7684\u5217\u540d\u3002<\/p>\n<h3 id=\"2-%e4%bf%ae%e6%94%b9-sql-%e8%aa%9e%e5%8f%a5-VBfKcknOIn\">2. \u4fee\u6539 SQL \u8a9e\u53e5<\/h3>\n<p>\u5982\u679c\u767c\u73fe\u6709\u91cd\u8907\u7684\u5217\u540d\uff0c\u5247\u9700\u8981\u4fee\u6539\u4f60\u7684 SQL \u8a9e\u53e5\u3002\u4f8b\u5982\uff0c\u7576\u5275\u5efa\u8868\u6642\uff0c\u78ba\u4fdd\u6bcf\u500b\u5217\u540d\u90fd\u662f\u552f\u4e00\u7684\uff1a<\/p>\n<pre><code>CREATE TABLE your_table_name (\n    id SERIAL PRIMARY KEY,\n    name VARCHAR(100),\n    age INT,\n    name VARCHAR(100)  -- \u9019\u88e1\u6703\u5c0e\u81f4\u932f\u8aa4\n);<\/code><\/pre>\n<p>\u61c9\u8a72\u5c07\u91cd\u8907\u7684\u5217\u540d\u66f4\u6539\u70ba\u552f\u4e00\u7684\u540d\u7a31\uff1a<\/p>\n<pre><code>CREATE TABLE your_table_name (\n    id SERIAL PRIMARY KEY,\n    name VARCHAR(100),\n    age INT,\n    nickname VARCHAR(100)  -- \u4fee\u6539\u70ba\u552f\u4e00\u7684\u5217\u540d\n);<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8-alter-table-%e8%aa%9e%e5%8f%a5-VBfKcknOIn\">3. \u4f7f\u7528 ALTER TABLE \u8a9e\u53e5<\/h3>\n<p>\u5982\u679c\u4f60\u5df2\u7d93\u5275\u5efa\u4e86\u8868\u4e26\u4e14\u9700\u8981\u6dfb\u52a0\u65b0\u5217\uff0c\u8acb\u78ba\u4fdd\u65b0\u5217\u7684\u540d\u7a31\u4e0d\u8207\u73fe\u6709\u5217\u91cd\u8907\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name \nADD COLUMN new_column_name VARCHAR(100);<\/code><\/pre>\n<p>\u5728\u6dfb\u52a0\u65b0\u5217\u4e4b\u524d\uff0c\u6aa2\u67e5\u73fe\u6709\u5217\u540d\u4ee5\u907f\u514d\u91cd\u8907\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-VBfKcknOIn\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42701 &#8211; duplicate_column \u662f\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u901a\u5e38\u7531\u65bc\u5217\u540d\u91cd\u8907\u5f15\u8d77\u3002\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5\u5217\u540d\u3001\u4fee\u6539 SQL \u8a9e\u53e5\u4ee5\u53ca\u4f7f\u7528 ALTER TABLE \u8a9e\u53e5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\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> \u89e3\u6c7a\u65b9\u6848\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42701 &#8211; duplicate_column\uff0c\u89e3\u6c7a\u91cd\u8907\u6b04\u4f4d\u554f\u984c\uff0c\u78ba\u4fdd\u8cc7\u6599\u5eab\u64cd\u4f5c\u9806\u5229\u9032\u884c\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-178988","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178988","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=178988"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178988\/revisions"}],"predecessor-version":[{"id":178989,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178988\/revisions\/178989"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}