{"id":179624,"date":"2024-11-09T03:26:21","date_gmt":"2024-11-08T19:26:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179624\/"},"modified":"2024-11-09T03:26:22","modified_gmt":"2024-11-08T19:26:22","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%bf%ab%e9%80%9f%e5%bb%ba%e8%a1%a8%e4%b8%a6%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5%ef%bc%9f-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179624\/","title":{"rendered":"\u5982\u4f55\u5728 MySQL \u6578\u64da\u5eab\u4e2d\u5feb\u901f\u5efa\u8868\u4e26\u6dfb\u52a0\u5b57\u6bb5\uff1f (mysql \u6578\u64da\u5eab\u5efa\u8868\u52a0\u5b57\u6bb5)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%bf%ab%e9%80%9f%e5%bb%ba%e8%a1%a8%e4%b8%a6%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5%ef%bc%9f-wYMovTIpqb\">\u5982\u4f55\u5728 MySQL \u6578\u64da\u5eab\u4e2d\u5feb\u901f\u5efa\u8868\u4e26\u6dfb\u52a0\u5b57\u6bb5\uff1f<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u61c9\u7528\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\uff0c\u800c MySQL \u4f5c\u70ba\u4e00\u500b\u958b\u6e90\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u56e0\u5176\u7a69\u5b9a\u6027\u548c\u9ad8\u6548\u6027\u800c\u53d7\u5230\u5ee3\u6cdb\u9752\u775e\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728 MySQL \u6578\u64da\u5eab\u4e2d\u5feb\u901f\u5efa\u8868\u4e26\u6dfb\u52a0\u5b57\u6bb5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u9ad8\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%b8%80%e3%80%81%e5%bb%ba%e8%a1%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-wYMovTIpqb\">\u4e00\u3001\u5efa\u8868\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 MySQL \u4e2d\uff0c\u5efa\u8868\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE \u8868\u540d (\n    \u5217\u540d1 \u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6],\n    \u5217\u540d2 \u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6],\n    ...\n);<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<strong>\u8868\u540d<\/strong>\u662f\u4f60\u8981\u5275\u5efa\u7684\u8868\u7684\u540d\u7a31\uff0c<strong>\u5217\u540d<\/strong>\u662f\u8868\u4e2d\u7684\u5b57\u6bb5\u540d\u7a31\uff0c<strong>\u6578\u64da\u985e\u578b<\/strong>\u5247\u662f\u8a72\u5b57\u6bb5\u6240\u80fd\u5b58\u5132\u7684\u6578\u64da\u985e\u578b\uff0c\u5982 INT\u3001VARCHAR\u3001DATE \u7b49\u3002<\/p>\n<h2 id=\"%e4%ba%8c%e3%80%81%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%89%b5%e5%bb%ba%e4%b8%80%e5%80%8b%e7%94%a8%e6%88%b6%e8%a1%a8-wYMovTIpqb\">\u4e8c\u3001\u793a\u4f8b\uff1a\u5275\u5efa\u4e00\u500b\u7528\u6236\u8868<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u8981\u5275\u5efa\u4e00\u500b\u540d\u70ba <strong>users<\/strong> \u7684\u7528\u6236\u8868\uff0c\u5305\u542b\u7528\u6236ID\u3001\u7528\u6236\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL UNIQUE\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>id<\/strong> \u662f\u7528\u6236\u7684\u552f\u4e00\u6a19\u8b58\uff0c\u4f7f\u7528 <code>AUTO_INCREMENT<\/code> \u4f7f\u5176\u81ea\u52d5\u905e\u589e\u3002<\/li>\n<li><strong>username<\/strong> \u662f\u7528\u6236\u540d\uff0c\u8a2d\u7f6e\u70ba <code>NOT NULL<\/code> \u4ee5\u78ba\u4fdd\u8a72\u5b57\u6bb5\u5fc5\u9808\u6709\u503c\u3002<\/li>\n<li><strong>email<\/strong> \u662f\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff0c\u8a2d\u7f6e\u70ba <code>UNIQUE<\/code> \u4ee5\u78ba\u4fdd\u6bcf\u500b\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u90fd\u662f\u552f\u4e00\u7684\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%b8%89%e3%80%81%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-wYMovTIpqb\">\u4e09\u3001\u6dfb\u52a0\u5b57\u6bb5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728\u5275\u5efa\u8868\u4e4b\u5f8c\uff0c\u53ef\u80fd\u6703\u9700\u8981\u6dfb\u52a0\u65b0\u7684\u5b57\u6bb5\u3002\u9019\u53ef\u4ee5\u901a\u904e <strong>ALTER TABLE<\/strong> \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d\nADD \u5217\u540d \u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6];<\/code><\/pre>\n<h2 id=\"%e5%9b%9b%e3%80%81%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%90%91%e7%94%a8%e6%88%b6%e8%a1%a8%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5-wYMovTIpqb\">\u56db\u3001\u793a\u4f8b\uff1a\u5411\u7528\u6236\u8868\u6dfb\u52a0\u5b57\u6bb5<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u60f3\u8981\u5411 <strong>users<\/strong> \u8868\u4e2d\u6dfb\u52a0\u4e00\u500b <strong>created_at<\/strong> \u5b57\u6bb5\uff0c\u7528\u65bc\u8a18\u9304\u7528\u6236\u7684\u8a3b\u518a\u6642\u9593\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE users\nADD created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<strong>created_at<\/strong> \u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u70ba <code>TIMESTAMP<\/code>\uff0c\u4e26\u4e14\u8a2d\u7f6e\u4e86\u9ed8\u8a8d\u503c\u70ba\u7576\u524d\u6642\u9593\u3002<\/p>\n<h2 id=\"%e4%ba%94%e3%80%81%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-wYMovTIpqb\">\u4e94\u3001\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u5275\u5efa\u8868\u6642\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u4ee5\u63d0\u9ad8\u6578\u64da\u5b58\u5132\u7684\u6548\u7387\u3002<\/li>\n<li>\u5728\u6dfb\u52a0\u5b57\u6bb5\u6642\uff0c\u61c9\u8003\u616e\u5230\u73fe\u6709\u6578\u64da\u7684\u517c\u5bb9\u6027\uff0c\u907f\u514d\u5c0d\u6578\u64da\u9020\u6210\u5f71\u97ff\u3002<\/li>\n<li>\u4f7f\u7528 <code>NOT NULL<\/code> \u548c <code>UNIQUE<\/code> \u7b49\u7d04\u675f\u689d\u4ef6\u53ef\u4ee5\u5e6b\u52a9\u4fdd\u6301\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wYMovTIpqb\">\u7e3d\u7d50<\/h2>\n<p>\u5728 MySQL \u6578\u64da\u5eab\u4e2d\u5feb\u901f\u5efa\u8868\u4e26\u6dfb\u52a0\u5b57\u6bb5\u662f\u4e00\u9805\u57fa\u672c\u800c\u91cd\u8981\u7684\u6280\u80fd\u3002\u901a\u904e\u638c\u63e1 <code>CREATE TABLE<\/code> \u548c <code>ALTER TABLE<\/code> \u7684\u4f7f\u7528\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9748\u6d3b\u5730\u7ba1\u7406\u6578\u64da\u7d50\u69cb\uff0c\u6eff\u8db3\u61c9\u7528\u9700\u6c42\u3002\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u90e8\u7f72\u60a8\u7684 MySQL \u6578\u64da\u5eab\uff0c\u78ba\u4fdd\u9ad8\u6548\u904b\u884c\u548c\u6578\u64da\u5b89\u5168\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728 MySQL \u6578\u64da\u5eab\u4e2d\u5feb\u901f\u5efa\u8868\u4e26\u6dfb\u52a0\u5b57\u6bb5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u958b\u767c\u6d41\u7a0b\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-179624","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179624","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=179624"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179624\/revisions"}],"predecessor-version":[{"id":179625,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179624\/revisions\/179625"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}