{"id":76188,"date":"2024-10-16T04:35:13","date_gmt":"2024-10-15T20:35:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76188\/"},"modified":"2024-10-16T04:35:13","modified_gmt":"2024-10-15T20:35:13","slug":"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8alter-table-table-add-column-type%e5%90%91%e8%a1%a8%e4%b8%ad%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97%e3%80%82","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76188\/","title":{"rendered":"MySQL\u5165\u9580\uff1a\u4f7f\u7528ALTER TABLE [table] ADD (column type)\u5411\u8868\u4e2d\u6dfb\u52a0\u65b0\u5217\u3002"},"content":{"rendered":"<h1 id=\"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8alter-table-table-add-column-type%e5%90%91%e8%a1%a8%e4%b8%ad%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97-vPwInWDRtG\">MySQL\u5165\u9580\uff1a\u4f7f\u7528ALTER TABLE [table] ADD (column type)\u5411\u8868\u4e2d\u6dfb\u52a0\u65b0\u5217<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u975e\u5e38\u6d41\u884c\u7684\u9078\u64c7\uff0c\u56e0\u70ba\u5b83\u7684\u9748\u6d3b\u6027\u548c\u5f37\u5927\u7684\u529f\u80fd\u3002\u7576\u6211\u5011\u9700\u8981\u5c0d\u73fe\u6709\u7684\u6578\u64da\u8868\u9032\u884c\u4fee\u6539\u6642\uff0cALTER TABLE\u8a9e\u53e5\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u91cd\u9ede\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u5411\u8868\u4e2d\u6dfb\u52a0\u65b0\u5217\u3002<\/p>\n<h2 id=\"alter-table%e8%aa%9e%e5%8f%a5%e6%a6%82%e8%bf%b0-vPwInWDRtG\">ALTER TABLE\u8a9e\u53e5\u6982\u8ff0<\/h2>\n<p>ALTER TABLE\u8a9e\u53e5\u5141\u8a31\u7528\u6236\u5c0d\u5df2\u5b58\u5728\u7684\u6578\u64da\u8868\u9032\u884c\u7d50\u69cb\u4e0a\u7684\u4fee\u6539\u3002\u9019\u4e9b\u4fee\u6539\u53ef\u4ee5\u5305\u62ec\u6dfb\u52a0\u65b0\u5217\u3001\u522a\u9664\u5217\u3001\u4fee\u6539\u5217\u7684\u6578\u64da\u985e\u578b\u7b49\u3002\u7576\u6211\u5011\u9700\u8981\u64f4\u5c55\u6578\u64da\u8868\u7684\u529f\u80fd\u6642\uff0c\u6dfb\u52a0\u65b0\u5217\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97%e7%9a%84%e8%aa%9e%e6%b3%95-vPwInWDRtG\">\u6dfb\u52a0\u65b0\u5217\u7684\u8a9e\u6cd5<\/h2>\n<p>\u8981\u5411\u4e00\u500b\u8868\u4e2d\u6dfb\u52a0\u65b0\u5217\uff0c\u57fa\u672c\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE [table_name] ADD [column_name] [data_type];<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff1a<\/p>\n<ul>\n<li><strong>[table_name]<\/strong>\uff1a\u8981\u4fee\u6539\u7684\u8868\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>[column_name]<\/strong>\uff1a\u8981\u6dfb\u52a0\u7684\u65b0\u5217\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>[data_type]<\/strong>\uff1a\u65b0\u5217\u7684\u6578\u64da\u985e\u578b\uff0c\u4f8b\u5982 INT\u3001VARCHAR\u3001DATE \u7b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e7%af%84%e4%be%8b-vPwInWDRtG\">\u5be6\u969b\u7bc4\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u54e1\u5de5\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u5982\u59d3\u540d\u548c\u5e74\u9f61\u3002\u73fe\u5728\uff0c\u6211\u5011\u5e0c\u671b\u5411\u8a72\u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u65b0\u7684\u5217\u4f86\u5b58\u5132\u54e1\u5de5\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>ALTER TABLE employees ADD email VARCHAR(255);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5411 <code>employees<\/code> \u8868\u4e2d\u6dfb\u52a0\u4e86\u4e00\u500b\u540d\u70ba <code>email<\/code> \u7684\u65b0\u5217\uff0c\u4e26\u6307\u5b9a\u5176\u6578\u64da\u985e\u578b\u70ba <code>VARCHAR(255)<\/code>\uff0c\u9019\u610f\u5473\u8457\u8a72\u5217\u53ef\u4ee5\u5b58\u5132\u6700\u591a255\u500b\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e5%a4%9a%e5%80%8b%e5%88%97-vPwInWDRtG\">\u6dfb\u52a0\u591a\u500b\u5217<\/h2>\n<p>\u5982\u679c\u9700\u8981\u4e00\u6b21\u6027\u6dfb\u52a0\u591a\u500b\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u9017\u865f\u5206\u9694\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u9084\u60f3\u6dfb\u52a0\u4e00\u500b\u540d\u70ba <code>hire_date<\/code> \u7684\u5217\u4f86\u5b58\u5132\u54e1\u5de5\u7684\u5165\u8077\u65e5\u671f\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE employees ADD email VARCHAR(255), ADD hire_date DATE;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u540c\u6642\u5411 <code>employees<\/code> \u8868\u4e2d\u6dfb\u52a0\u4e86\u5169\u500b\u65b0\u5217\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-vPwInWDRtG\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5728\u6dfb\u52a0\u65b0\u5217\u4e4b\u524d\uff0c\u78ba\u4fdd\u8a72\u5217\u7684\u540d\u7a31\u4e0d\u8207\u73fe\u6709\u5217\u91cd\u8907\u3002<\/li>\n<li>\u6839\u64da\u6578\u64da\u985e\u578b\u7684\u4e0d\u540c\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u5230\u8868\u7684\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<li>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u9032\u884c\u7d50\u69cb\u4fee\u6539\u6642\uff0c\u5efa\u8b70\u5148\u9032\u884c\u5099\u4efd\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-vPwInWDRtG\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u5411MySQL\u8868\u4e2d\u6dfb\u52a0\u65b0\u5217\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u64cd\u4f5c\u3002\u901a\u904e\u6b63\u78ba\u7684\u8a9e\u6cd5\u548c\u6ce8\u610f\u4e8b\u9805\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u64f4\u5c55\u6578\u64da\u8868\u7684\u7d50\u69cb\uff0c\u4ee5\u6eff\u8db3\u4e0d\u65b7\u8b8a\u5316\u7684\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u7528\u6236\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\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u904b\u884c\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to use ALTER TABLE in MySQL to add new columns to your tables efficiently. Enhance your database structure with ease!<\/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-76188","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76188","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=76188"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76188\/revisions"}],"predecessor-version":[{"id":76189,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76188\/revisions\/76189"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76188"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}