{"id":160751,"date":"2024-11-04T00:42:23","date_gmt":"2024-11-03T16:42:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160751\/"},"modified":"2024-11-04T00:42:24","modified_gmt":"2024-11-03T16:42:24","slug":"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql%e6%9f%a5%e7%9c%8b%e8%a1%a8%e4%b8%ad%e7%9a%84%e7%b4%84%e6%9d%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160751\/","title":{"rendered":"\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL\u67e5\u770b\u8868\u4e2d\u7684\u7d04\u675f"},"content":{"rendered":"<h1 id=\"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql%e6%9f%a5%e7%9c%8b%e8%a1%a8%e4%b8%ad%e7%9a%84%e7%b4%84%e6%9d%9f-igNnfhFnja\">\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL\u67e5\u770b\u8868\u4e2d\u7684\u7d04\u675f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d04\u675f\uff08Constraints\uff09\u662f\u7528\u4f86\u9650\u5236\u8cc7\u6599\u8868\u4e2d\u6578\u64da\u7684\u898f\u5247\u3002\u9019\u4e9b\u7d04\u675f\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u5728MySQL\u4e2d\uff0c\u7d04\u675f\u53ef\u4ee5\u5206\u70ba\u5e7e\u7a2e\u985e\u578b\uff0c\u5305\u62ec\u4e3b\u9375\u7d04\u675f\u3001\u5916\u9375\u7d04\u675f\u3001\u552f\u4e00\u7d04\u675f\u548c\u6aa2\u67e5\u7d04\u675f\u7b49\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728MySQL\u4e2d\u67e5\u770b\u8868\u4e2d\u7684\u7d04\u675f\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u548c\u7dad\u8b77\u8cc7\u6599\u5eab\u3002<\/p>\n<h2 id=\"%e7%b4%84%e6%9d%9f%e7%9a%84%e9%a1%9e%e5%9e%8b-igNnfhFnja\">\u7d04\u675f\u7684\u985e\u578b<\/h2>\n<ul>\n<li><strong>\u4e3b\u9375\u7d04\u675f\uff08PRIMARY KEY\uff09<\/strong>\uff1a\u4e3b\u9375\u662f\u552f\u4e00\u6a19\u8b58\u8cc7\u6599\u8868\u4e2d\u6bcf\u4e00\u884c\u7684\u5b57\u6bb5\uff0c\u4e0d\u80fd\u70ba\u7a7a\u4e14\u5fc5\u9808\u552f\u4e00\u3002<\/li>\n<li><strong>\u5916\u9375\u7d04\u675f\uff08FOREIGN KEY\uff09<\/strong>\uff1a\u5916\u9375\u7528\u65bc\u5efa\u7acb\u5169\u500b\u8868\u4e4b\u9593\u7684\u95dc\u806f\uff0c\u78ba\u4fdd\u8cc7\u6599\u7684\u53c3\u7167\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u552f\u4e00\u7d04\u675f\uff08UNIQUE\uff09<\/strong>\uff1a\u552f\u4e00\u7d04\u675f\u78ba\u4fdd\u67d0\u4e00\u5217\u7684\u6240\u6709\u503c\u90fd\u662f\u552f\u4e00\u7684\uff0c\u4f46\u53ef\u4ee5\u5305\u542b\u7a7a\u503c\u3002<\/li>\n<li><strong>\u6aa2\u67e5\u7d04\u675f\uff08CHECK\uff09<\/strong>\uff1a\u6aa2\u67e5\u7d04\u675f\u7528\u65bc\u9650\u5236\u67d0\u4e00\u5217\u7684\u503c\u5fc5\u9808\u6eff\u8db3\u7279\u5b9a\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9f%a5%e7%9c%8b%e8%a1%a8%e4%b8%ad%e7%9a%84%e7%b4%84%e6%9d%9f-igNnfhFnja\">\u67e5\u770b\u8868\u4e2d\u7684\u7d04\u675f<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u65b9\u6cd5\u4f86\u67e5\u770b\u8868\u4e2d\u7684\u7d04\u675f\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8show-create-table%e5%91%bd%e4%bb%a4-igNnfhFnja\">1. \u4f7f\u7528SHOW CREATE TABLE\u547d\u4ee4<\/h3>\n<p>\u6700\u7c21\u55ae\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 <code>SHOW CREATE TABLE<\/code> \u547d\u4ee4\u3002\u9019\u500b\u547d\u4ee4\u6703\u986f\u793a\u5275\u5efa\u8868\u7684SQL\u8a9e\u53e5\uff0c\u5305\u62ec\u6240\u6709\u7684\u7d04\u675f\u3002<\/p>\n<pre><code>SHOW CREATE TABLE your_table_name;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u547d\u4ee4\u5f8c\uff0c\u60a8\u5c07\u770b\u5230\u985e\u4f3c\u4ee5\u4e0b\u7684\u8f38\u51fa\uff1a<\/p>\n<pre><code>CREATE TABLE `your_table_name` (\n  `id` int(11) NOT NULL,\n  `name` varchar(255) NOT NULL,\n  PRIMARY KEY (`id`),\n  UNIQUE KEY `unique_name` (`name`)\n) ENGINE=InnoDB;<\/code><\/pre>\n<h3 id=\"2-%e6%9f%a5%e8%a9%a2information_schema-igNnfhFnja\">2. \u67e5\u8a62information_schema<\/h3>\n<p>MySQL\u63d0\u4f9b\u4e86\u4e00\u500b\u540d\u70ba <code>information_schema<\/code> \u7684\u7cfb\u7d71\u6578\u64da\u5eab\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u6240\u6709\u8cc7\u6599\u5eab\u7684\u5143\u6578\u64da\u3002\u60a8\u53ef\u4ee5\u67e5\u8a62 <code>TABLE_CONSTRAINTS<\/code> \u8868\u4f86\u7372\u53d6\u7d04\u675f\u4fe1\u606f\u3002<\/p>\n<pre><code>SELECT * FROM information_schema.TABLE_CONSTRAINTS \nWHERE TABLE_NAME = 'your_table_name';<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u8a72\u8868\u7684\u6240\u6709\u7d04\u675f\uff0c\u5305\u62ec\u7d04\u675f\u985e\u578b\u548c\u7d04\u675f\u540d\u7a31\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8describe%e5%91%bd%e4%bb%a4-igNnfhFnja\">3. \u4f7f\u7528DESCRIBE\u547d\u4ee4<\/h3>\n<p>\u96d6\u7136 <code>DESCRIBE<\/code> \u547d\u4ee4\u4e3b\u8981\u7528\u65bc\u67e5\u770b\u8868\u7684\u7d50\u69cb\uff0c\u4f46\u5b83\u4e5f\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e9b\u7d04\u675f\u7684\u4fe1\u606f\u3002<\/p>\n<pre><code>DESCRIBE your_table_name;<\/code><\/pre>\n<p>\u9019\u5c07\u986f\u793a\u8868\u4e2d\u6bcf\u4e00\u5217\u7684\u6578\u64da\u985e\u578b\u3001\u662f\u5426\u53ef\u4ee5\u70ba\u7a7a\u4ee5\u53ca\u662f\u5426\u6709\u7d22\u5f15\u7b49\u4fe1\u606f\uff0c\u4f46\u4e0d\u6703\u986f\u793a\u6240\u6709\u7d04\u675f\u7684\u8a73\u7d30\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e6%9f%a5%e7%9c%8b%e7%b4%84%e6%9d%9f-igNnfhFnja\">\u793a\u4f8b\uff1a\u67e5\u770b\u7d04\u675f<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u67e5\u770b\u5176\u7d04\u675f\uff1a<\/p>\n<pre><code>SHOW CREATE TABLE employees;<\/code><\/pre>\n<p>\u6216\u8005\u67e5\u8a62 <code>information_schema<\/code>\uff1a<\/p>\n<pre><code>SELECT * FROM information_schema.TABLE_CONSTRAINTS \nWHERE TABLE_NAME = 'employees';<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-igNnfhFnja\">\u7e3d\u7d50<\/h2>\n<p>\u4e86\u89e3\u5982\u4f55\u67e5\u770bMySQL\u8868\u4e2d\u7684\u7d04\u675f\u5c0d\u65bc\u8cc7\u6599\u5eab\u7684\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528 <code>SHOW CREATE TABLE<\/code>\u3001\u67e5\u8a62 <code>information_schema<\/code> \u6216\u4f7f\u7528 <code>DESCRIBE<\/code> \u547d\u4ee4\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u7372\u53d6\u8868\u7684\u7d04\u675f\u4fe1\u606f\uff0c\u5f9e\u800c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684MySQL\u8cc7\u6599\u5eab\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728MySQL\u4e2d\u67e5\u770b\u8868\u7684\u7d04\u675f\uff0c\u638c\u63e1\u8cc7\u6599\u5eab\u7ba1\u7406\u7684\u95dc\u9375\u6280\u5de7\uff0c\u63d0\u5347\u4f60\u7684\u6578\u64da\u64cd\u4f5c\u80fd\u529b\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-160751","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160751","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=160751"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160751\/revisions"}],"predecessor-version":[{"id":160752,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160751\/revisions\/160752"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}