{"id":186888,"date":"2024-11-11T09:40:25","date_gmt":"2024-11-11T01:40:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186888\/"},"modified":"2024-11-11T09:40:26","modified_gmt":"2024-11-11T01:40:26","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%97%e7%9a%84%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6%e5%8f%8a%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%97%e5%94%af%e4%b8%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186888\/","title":{"rendered":"\u6578\u64da\u5eab\u5217\u7684\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u53ca\u5be6\u73fe\u65b9\u6cd5 (\u6578\u64da\u5eab\u5217\u552f\u4e00\u7d04\u675f\u689d\u4ef6)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%97%e7%9a%84%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6%e5%8f%8a%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-pQKpGlwjdP\">\u6578\u64da\u5eab\u5217\u7684\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u53ca\u5be6\u73fe\u65b9\u6cd5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u7684\u4e3b\u8981\u529f\u80fd\u662f\u9632\u6b62\u5728\u540c\u4e00\u5217\u4e2d\u51fa\u73fe\u91cd\u8907\u7684\u6578\u64da\uff0c\u9019\u5c0d\u65bc\u4fdd\u6301\u6578\u64da\u7684\u6e96\u78ba\u6027\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u5217\u7684\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u53ca\u5176\u5be6\u73fe\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6%ef%bc%9f-pQKpGlwjdP\">\u4ec0\u9ebc\u662f\u552f\u4e00\u7d04\u675f\u689d\u4ef6\uff1f<\/h2>\n<p>\u552f\u4e00\u7d04\u675f\u689d\u4ef6\uff08Unique Constraint\uff09\u662f\u4e00\u7a2e\u6578\u64da\u5eab\u7d04\u675f\uff0c\u7528\u65bc\u78ba\u4fdd\u67d0\u4e00\u5217\u6216\u67d0\u5e7e\u5217\u7684\u6578\u64da\u5728\u6574\u500b\u8868\u4e2d\u662f\u552f\u4e00\u7684\u3002\u9019\u610f\u5473\u8457\u5728\u9019\u4e9b\u5217\u4e2d\uff0c\u4e0d\u80fd\u6709\u5169\u884c\u6578\u64da\u64c1\u6709\u76f8\u540c\u7684\u503c\u3002\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u901a\u5e38\u7528\u65bc\u4e3b\u9375\u4ee5\u5916\u7684\u5217\uff0c\u9019\u4e9b\u5217\u4e5f\u9700\u8981\u4fdd\u6301\u552f\u4e00\u6027\uff0c\u4f8b\u5982\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u6216\u7528\u6236\u540d\u3002<\/p>\n<h2 id=\"%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6%e7%9a%84%e7%89%b9%e9%bb%9e-pQKpGlwjdP\">\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u7684\u7279\u9ede<\/h2>\n<ul>\n<li>\u552f\u4e00\u6027\uff1a\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u78ba\u4fdd\u4e86\u6307\u5b9a\u5217\u4e2d\u7684\u6bcf\u500b\u503c\u90fd\u662f\u552f\u4e00\u7684\u3002<\/li>\n<li>\u5141\u8a31\u7a7a\u503c\uff1a\u8207\u4e3b\u9375\u4e0d\u540c\uff0c\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u5141\u8a31\u5217\u4e2d\u5b58\u5728\u7a7a\u503c\uff08NULL\uff09\uff0c\u4f46\u6bcf\u500b\u975e\u7a7a\u503c\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/li>\n<li>\u591a\u5217\u552f\u4e00\u7d04\u675f\uff1a\u53ef\u4ee5\u5728\u591a\u500b\u5217\u4e0a\u8a2d\u7f6e\u552f\u4e00\u7d04\u675f\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u9019\u4e9b\u5217\u7684\u7d44\u5408\u662f\u552f\u4e00\u7684\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6-pQKpGlwjdP\">\u5982\u4f55\u5be6\u73fe\u552f\u4e00\u7d04\u675f\u689d\u4ef6<\/h2>\n<p>\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5be6\u73fe\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u7684\u65b9\u6cd5\u7565\u6709\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u8a2d\u7f6e\u552f\u4e00\u7d04\u675f\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-mysql-pQKpGlwjdP\">1. MySQL<\/h3>\n<pre><code>CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    email VARCHAR(255) UNIQUE,\n    username VARCHAR(255) UNIQUE\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u4e26\u5728 <code>email<\/code> \u548c <code>username<\/code> \u5217\u4e0a\u8a2d\u7f6e\u4e86\u552f\u4e00\u7d04\u675f\u3002\u9019\u6a23\uff0c\u4efb\u4f55\u5617\u8a66\u63d2\u5165\u91cd\u8907\u96fb\u5b50\u90f5\u4ef6\u6216\u7528\u6236\u540d\u7684\u64cd\u4f5c\u90fd\u6703\u5931\u6557\u3002<\/p>\n<h3 id=\"2-postgresql-pQKpGlwjdP\">2. PostgreSQL<\/h3>\n<pre><code>CREATE TABLE products (\n    id SERIAL PRIMARY KEY,\n    product_code VARCHAR(100) UNIQUE,\n    product_name VARCHAR(255)\n);<\/code><\/pre>\n<p>\u5728PostgreSQL\u4e2d\uff0c\u6211\u5011\u540c\u6a23\u53ef\u4ee5\u4f7f\u7528 <code>UNIQUE<\/code> \u95dc\u9375\u5b57\u4f86\u8a2d\u7f6e\u552f\u4e00\u7d04\u675f\u3002\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>product_code<\/code> \u5217\u88ab\u8a2d\u7f6e\u70ba\u552f\u4e00\uff0c\u78ba\u4fdd\u6bcf\u500b\u7522\u54c1\u90fd\u6709\u7368\u7279\u7684\u4ee3\u78bc\u3002<\/p>\n<h3 id=\"3-sql-server-pQKpGlwjdP\">3. SQL Server<\/h3>\n<pre><code>CREATE TABLE orders (\n    order_id INT PRIMARY KEY,\n    order_number VARCHAR(50) UNIQUE,\n    customer_id INT\n);<\/code><\/pre>\n<p>\u5728SQL Server\u4e2d\uff0c\u552f\u4e00\u7d04\u675f\u7684\u8a2d\u7f6e\u65b9\u5f0f\u8207\u5176\u4ed6\u6578\u64da\u5eab\u985e\u4f3c\u3002\u5728\u9019\u88e1\uff0c<code>order_number<\/code> \u5217\u88ab\u8a2d\u7f6e\u70ba\u552f\u4e00\uff0c\u4ee5\u9632\u6b62\u91cd\u8907\u7684\u8a02\u55ae\u865f\u3002<\/p>\n<h2 id=\"%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6%e7%9a%84%e5%84%aa%e5%8b%a2-pQKpGlwjdP\">\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u5e6b\u52a9\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u91cd\u8907\u6578\u64da\u7684\u51fa\u73fe\u3002<\/li>\n<li><strong>\u67e5\u8a62\u6548\u7387\uff1a<\/strong>\u64c1\u6709\u552f\u4e00\u7d04\u675f\u7684\u5217\u901a\u5e38\u6703\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u53ef\u4ee5\u66f4\u5feb\u5730\u5b9a\u4f4d\u5230\u7279\u5b9a\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u696d\u52d9\u908f\u8f2f\u652f\u6301\uff1a<\/strong>\u5728\u8a31\u591a\u696d\u52d9\u5834\u666f\u4e2d\uff0c\u552f\u4e00\u7d04\u675f\u662f\u5be6\u73fe\u696d\u52d9\u908f\u8f2f\u7684\u57fa\u790e\uff0c\u4f8b\u5982\u7528\u6236\u8a3b\u518a\u6642\u7684\u96fb\u5b50\u90f5\u4ef6\u9a57\u8b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-pQKpGlwjdP\">\u7e3d\u7d50<\/h2>\n<p>\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u552f\u4e00\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u5728\u6578\u64da\u5eab\u4e2d\u6b63\u78ba\u5be6\u73fe\u552f\u4e00\u7d04\u675f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u9632\u6b62\u6578\u64da\u91cd\u8907\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u7684\u6548\u7387\uff0c\u4e26\u652f\u6301\u696d\u52d9\u908f\u8f2f\u7684\u5be6\u73fe\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u7ba1\u7406\u6578\u64da\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u5217\u7684\u552f\u4e00\u7d04\u675f\u689d\u4ef6\u53ca\u5176\u5be6\u73fe\u65b9\u6cd5\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u8207\u4e00\u81f4\u6027\uff0c\u907f\u514d\u91cd\u8907\u6578\u64da\u7684\u51fa\u73fe\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-186888","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186888","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=186888"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186888\/revisions"}],"predecessor-version":[{"id":186889,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186888\/revisions\/186889"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}