{"id":179032,"date":"2024-11-08T22:26:29","date_gmt":"2024-11-08T14:26:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179032\/"},"modified":"2024-11-08T22:26:30","modified_gmt":"2024-11-08T14:26:30","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%9a42p07-duplicate_table%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179032\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P07 &#8211; duplicate_table\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%9a42p07-duplicate_table-zmqfLlRMzd\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P07 &#8211; duplicate_table<\/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 42P07\uff0c\u9019\u8868\u793a\u51fa\u73fe\u4e86\u91cd\u8907\u7684\u8868\u540d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u7d93\u5b58\u5728\u7684\u8868\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u554f\u984c\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-42p07-%e7%9a%84%e5%8e%9f%e5%9b%a0-zmqfLlRMzd\">\u932f\u8aa4\u4ee3\u78bc 42P07 \u7684\u539f\u56e0<\/h2>\n<p>\u7576\u4f60\u5728 PostgreSQL \u4e2d\u57f7\u884c\u4e00\u500b CREATE TABLE \u8a9e\u53e5\u6642\uff0c\u5982\u679c\u6307\u5b9a\u7684\u8868\u540d\u5df2\u7d93\u5b58\u5728\u65bc\u7576\u524d\u6578\u64da\u5eab\u4e2d\uff0c\u5247\u6703\u5f15\u767c\u932f\u8aa4 42P07\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u5728\u540c\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u591a\u6b21\u57f7\u884c\u76f8\u540c\u7684 CREATE TABLE \u8a9e\u53e5\u3002<\/li>\n<li>\u5728\u4e0d\u540c\u7684 SQL \u8173\u672c\u4e2d\u5275\u5efa\u76f8\u540c\u540d\u7a31\u7684\u8868\u3002<\/li>\n<li>\u5728\u4f7f\u7528\u9077\u79fb\u5de5\u5177\u6216\u6846\u67b6\u6642\uff0c\u672a\u6b63\u78ba\u7ba1\u7406\u8868\u7684\u5275\u5efa\u548c\u522a\u9664\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%aa%a2%e6%9f%a5%e8%a1%a8%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8-zmqfLlRMzd\">\u5982\u4f55\u6aa2\u67e5\u8868\u662f\u5426\u5b58\u5728<\/h2>\n<p>\u5728\u5275\u5efa\u8868\u4e4b\u524d\uff0c\u6aa2\u67e5\u8a72\u8868\u662f\u5426\u5df2\u5b58\u5728\u662f\u4e00\u500b\u826f\u597d\u7684\u7fd2\u6163\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u6aa2\u67e5\u7279\u5b9a\u8868\u662f\u5426\u5b58\u5728\uff1a<\/p>\n<pre><code>SELECT to_regclass('public.your_table_name');<\/code><\/pre>\n<p>\u5982\u679c\u8fd4\u56de\u503c\u70ba NULL\uff0c\u5247\u8868\u793a\u8a72\u8868\u4e0d\u5b58\u5728\uff1b\u5982\u679c\u8fd4\u56de\u8868\u540d\uff0c\u5247\u8868\u793a\u8a72\u8868\u5df2\u5b58\u5728\u3002<\/p>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-zmqfLlRMzd\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-if-not-exists-%e8%aa%9e%e5%8f%a5-zmqfLlRMzd\">1. \u4f7f\u7528 IF NOT EXISTS \u8a9e\u53e5<\/h3>\n<p>\u5728\u5275\u5efa\u8868\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 IF NOT EXISTS \u8a9e\u53e5\u4f86\u907f\u514d\u91cd\u8907\u5275\u5efa\u8868\u7684\u932f\u8aa4\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE IF NOT EXISTS your_table_name (\n    id SERIAL PRIMARY KEY,\n    name VARCHAR(100)\n);<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u5373\u4f7f\u8868\u5df2\u5b58\u5728\uff0cPostgreSQL \u4e5f\u4e0d\u6703\u5831\u932f\uff0c\u800c\u662f\u6703\u8df3\u904e\u5275\u5efa\u64cd\u4f5c\u3002<\/p>\n<h3 id=\"2-%e5%88%aa%e9%99%a4%e5%b7%b2%e5%ad%98%e5%9c%a8%e7%9a%84%e8%a1%a8-zmqfLlRMzd\">2. \u522a\u9664\u5df2\u5b58\u5728\u7684\u8868<\/h3>\n<p>\u5982\u679c\u78ba\u5b9a\u4e0d\u518d\u9700\u8981\u5df2\u5b58\u5728\u7684\u8868\uff0c\u53ef\u4ee5\u9078\u64c7\u522a\u9664\u5b83\u3002\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u522a\u9664\u8868\uff1a<\/p>\n<pre><code>DROP TABLE your_table_name;<\/code><\/pre>\n<p>\u5728\u522a\u9664\u8868\u4e4b\u524d\uff0c\u8acb\u52d9\u5fc5\u78ba\u8a8d\u8a72\u8868\u4e2d\u7684\u6578\u64da\u662f\u5426\u9700\u8981\u5099\u4efd\uff0c\u56e0\u70ba\u9019\u500b\u64cd\u4f5c\u662f\u4e0d\u53ef\u9006\u7684\u3002<\/p>\n<h3 id=\"3-%e9%87%8d%e5%91%bd%e5%90%8d%e8%a1%a8-zmqfLlRMzd\">3. \u91cd\u547d\u540d\u8868<\/h3>\n<p>\u5982\u679c\u9700\u8981\u4fdd\u7559\u5df2\u5b58\u5728\u7684\u8868\uff0c\u53ef\u4ee5\u8003\u616e\u91cd\u547d\u540d\u65b0\u8868\u3002\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u91cd\u547d\u540d\u8868\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name RENAME TO new_table_name;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u540d\u7a31\u885d\u7a81\uff0c\u4e26\u4fdd\u7559\u539f\u6709\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-zmqfLlRMzd\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42P07 \u901a\u5e38\u662f\u7531\u65bc\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u5b58\u5728\u7684\u8868\u800c\u5f15\u8d77\u7684\u3002\u901a\u904e\u4f7f\u7528 IF NOT EXISTS \u8a9e\u53e5\u3001\u522a\u9664\u5df2\u5b58\u5728\u7684\u8868\u6216\u91cd\u547d\u540d\u8868\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u4e86\u89e3\u5982\u4f55\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u8868\u662f\u6bcf\u4f4d\u958b\u767c\u8005\u5fc5\u5099\u7684\u6280\u80fd\uff0c\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u958b\u767c\u6548\u7387\uff0c\u9084\u80fd\u6e1b\u5c11\u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42P07\uff08duplicate_table\uff09\uff0c\u907f\u514d\u91cd\u8907\u5275\u5efa\u8868\u683c\u7684\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u904b\u884c\u9806\u5229\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-179032","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179032","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=179032"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179032\/revisions"}],"predecessor-version":[{"id":179033,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179032\/revisions\/179033"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}