{"id":20363,"date":"2024-01-02T04:56:19","date_gmt":"2024-01-02T04:56:19","guid":{"rendered":"https:\/\/server.hk\/blog\/20363\/"},"modified":"2024-11-14T10:39:45","modified_gmt":"2024-11-14T02:39:45","slug":"postgresql-command-drop-domain","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20363\/","title":{"rendered":"PostgreSQL \u547d\u4ee4\uff1aDROP DOMAIN"},"content":{"rendered":"<h1 id=\"postgresql-command-drop-domain-AcorATPITG\">PostgreSQL \u547d\u4ee4\uff1aDROP DOMAIN<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u591a\u7a2e\u529f\u80fd\u548c\u5be6\u7528\u6027\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u547d\u4ee4\u662f <code>DROP DOMAIN<\/code>\uff0c\u8a72\u547d\u4ee4\u5141\u8a31\u7528\u6236\u5f9e\u6578\u64da\u5eab\u4e2d\u522a\u9664\u4e00\u500b\u57df\u3002<\/p>\n<h2 id=\"what-is-a-domain-in-postgresql-AcorATPITG\">\u4ec0\u9ebc\u662f PostgreSQL \u4e2d\u7684\u57df\uff1f<\/h2>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u57df\u662f\u4e00\u7a2e\u7528\u6236\u81ea\u5b9a\u7fa9\u7684\u6578\u64da\u985e\u578b\uff0c\u5141\u8a31\u60a8\u70ba\u8868\u4e2d\u7684\u4e00\u500b\u6216\u591a\u500b\u6b04\u4f4d\u5275\u5efa\u4e00\u7d44\u7d04\u675f\u3002\u901a\u904e\u9650\u5236\u53ef\u4ee5\u5b58\u5132\u5728\u6b04\u4f4d\u4e2d\u7684\u503c\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u4fdd\u6301\u6578\u64da\u5b8c\u6574\u6027\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u7576\u60a8\u5e0c\u671b\u5c0d\u591a\u500b\u6b04\u4f4d\u61c9\u7528\u76f8\u540c\u7684\u7d04\u675f\u6216\u5275\u5efa\u5177\u6709\u7279\u5b9a\u7d04\u675f\u7684\u81ea\u5b9a\u7fa9\u6578\u64da\u985e\u578b\u6642\uff0c\u57df\u662f\u975e\u5e38\u6709\u7528\u7684\u3002<\/p>\n<h2 id=\"syntax-of-the-drop-domain-command-AcorATPITG\">DROP DOMAIN \u547d\u4ee4\u7684\u8a9e\u6cd5<\/h2>\n<p>DROP DOMAIN \u547d\u4ee4\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DROP DOMAIN [IF EXISTS] domain_name [CASCADE | RESTRICT];\r\n<\/code><\/pre>\n<p>\u6211\u5011\u4f86\u5206\u89e3\u4e00\u4e0b\u9019\u500b\u8a9e\u6cd5\uff1a<\/p>\n<ul>\n<li><code>IF EXISTS<\/code>\uff08\u53ef\u9078\uff09\uff1a\u6b64\u5b50\u53e5\u5141\u8a31\u60a8\u5728\u57df\u4e0d\u5b58\u5728\u6642\u907f\u514d\u51fa\u932f\u3002<\/li>\n<li><code>domain_name<\/code>\uff1a\u6307\u5b9a\u60a8\u60f3\u8981\u522a\u9664\u7684\u57df\u540d\u7a31\u3002<\/li>\n<li><code>CASCADE | RESTRICT<\/code>\uff08\u53ef\u9078\uff09\uff1a\u6307\u5b9a\u5c0d\u4f9d\u8cf4\u65bc\u8a72\u57df\u7684\u5c0d\u8c61\u61c9\u8a72\u57f7\u884c\u4ec0\u9ebc\u64cd\u4f5c\u3002\u5982\u679c\u4f7f\u7528 <code>CASCADE<\/code>\uff0c\u6240\u6709\u4f9d\u8cf4\u65bc\u8a72\u57df\u7684\u5c0d\u8c61\u90fd\u5c07\u8207\u8a72\u57df\u4e00\u8d77\u522a\u9664\u3002\u5982\u679c\u4f7f\u7528 <code>RESTRICT<\/code>\uff0c\u5247\u5982\u679c\u6709\u4efb\u4f55\u4f9d\u8cf4\u5c0d\u8c61\uff0c\u547d\u4ee4\u5c07\u5931\u6557\u3002<\/li>\n<\/ul>\n<h2 id=\"examples-AcorATPITG\">\u7bc4\u4f8b<\/h2>\n<p>\u8b93\u6211\u5011\u4f86\u770b\u770b\u4e00\u4e9b\u7bc4\u4f8b\uff0c\u4e86\u89e3 DROP DOMAIN \u547d\u4ee4\u662f\u5982\u4f55\u904b\u4f5c\u7684\u3002<\/p>\n<p><strong>\u7bc4\u4f8b 1\uff1a<\/strong><\/p>\n<pre><code>DROP DOMAIN email_domain;\r\n<\/code><\/pre>\n<p>\u6b64\u547d\u4ee4\u5c07\u5f9e\u6578\u64da\u5eab\u4e2d\u522a\u9664\u540d\u70ba <code>email_domain<\/code> \u7684\u57df\u3002\u5982\u679c\u6709\u4efb\u4f55\u6b04\u4f4d\u6216\u7d04\u675f\u4f9d\u8cf4\u65bc\u6b64\u57df\uff0c\u5247\u8a72\u547d\u4ee4\u5c07\u5931\u6557\u3002<\/p>\n<p><strong>\u7bc4\u4f8b 2\uff1a<\/strong><\/p>\n<pre><code>DROP DOMAIN IF EXISTS email_domain CASCADE;\r\n<\/code><\/pre>\n<p>\u6b64\u547d\u4ee4\u5c07\u522a\u9664\u540d\u70ba <code>email_domain<\/code> \u7684\u57df\uff08\u5982\u679c\u5b58\u5728\uff09\u3002\u5982\u679c\u6709\u4efb\u4f55\u6b04\u4f4d\u6216\u7d04\u675f\u4f9d\u8cf4\u65bc\u6b64\u57df\uff0c\u9019\u4e9b\u4f9d\u8cf4\u5c0d\u8c61\u4e5f\u5c07\u88ab\u522a\u9664\u3002<\/p>\n<h2 id=\"summary-AcorATPITG\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>DROP DOMAIN<\/code> \u547d\u4ee4\u5141\u8a31\u60a8\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u7528\u6236\u81ea\u5b9a\u7fa9\u7684\u57df\u3002\u9019\u662f\u4e00\u500b\u7ba1\u7406\u6578\u64da\u5b8c\u6574\u6027\u548c\u5f37\u5236\u7d04\u675f\u7684\u5f37\u5927\u5de5\u5177\u3002\u901a\u904e\u4f7f\u7528\u5408\u9069\u7684\u8a9e\u6cd5\u548c\u9078\u9805\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u522a\u9664\u57df\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6709\u8208\u8da3\u4e86\u89e3\u66f4\u591a\u6709\u95dc VPS \u4e3b\u6a5f\u670d\u52d9\u53ca\u5176\u5982\u4f55\u63d0\u5347\u60a8\u7684\u696d\u52d9\uff0c\u8acb\u8003\u616e\u63a2\u7d22 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002\u900f\u904e\u4ed6\u5011\u4e00\u6d41\u7684 VPS \u89e3\u6c7a\u65b9\u6848\uff0c\u60a8\u53ef\u4ee5\u4eab\u53d7\u53ef\u9760\u4e14\u5177\u64f4\u5c55\u6027\u7684\u4e3b\u6a5f\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PostgreSQL \u547d\u4ee4\uff1aDR&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-20363","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20363","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=20363"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20363\/revisions"}],"predecessor-version":[{"id":24392,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20363\/revisions\/24392"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}