{"id":77148,"date":"2024-10-16T10:29:14","date_gmt":"2024-10-16T02:29:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/77148\/"},"modified":"2024-10-16T10:29:15","modified_gmt":"2024-10-16T02:29:15","slug":"mysql%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/77148\/","title":{"rendered":"MySQL\u4fee\u6539\u8868\u7684\u5be6\u969b\u61c9\u7528\u4ee3\u78bc\u793a\u4f8b"},"content":{"rendered":"<h1 id=\"mysql%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b-VLwuZLsjbb\">MySQL\u4fee\u6539\u8868\u7684\u5be6\u969b\u61c9\u7528\u4ee3\u78bc\u793a\u4f8b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u767c\u5c55\uff0c\u6578\u64da\u8868\u7684\u7d50\u69cb\u53ef\u80fd\u9700\u8981\u9032\u884c\u8abf\u6574\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528MySQL\u4fee\u6539\u8868\u7684\u7d50\u69cb\uff0c\u4e26\u63d0\u4f9b\u5be6\u969b\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"mysql%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-VLwuZLsjbb\">MySQL\u4fee\u6539\u8868\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u4fee\u6539\u8868\u7684\u7d50\u69cb\u4e3b\u8981\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u3002\u9019\u500b\u8a9e\u53e5\u53ef\u4ee5\u7528\u4f86\u6dfb\u52a0\u3001\u522a\u9664\u6216\u4fee\u6539\u8868\u4e2d\u7684\u5217\u3002\u4ee5\u4e0b\u662fALTER TABLE\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE table_name\n    action;\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>table_name<\/code>\u662f\u8981\u4fee\u6539\u7684\u8868\u540d\uff0c<code>action<\/code>\u662f\u5177\u9ad4\u7684\u64cd\u4f5c\uff0c\u5982\u6dfb\u52a0\u5217\u3001\u522a\u9664\u5217\u6216\u4fee\u6539\u5217\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97-VLwuZLsjbb\">\u6dfb\u52a0\u65b0\u5217<\/h2>\n<p>\u5982\u679c\u9700\u8981\u5728\u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u65b0\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE table_name\n    ADD column_name column_type;\n<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>users<\/code>\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u6dfb\u52a0\u4e00\u500b\u540d\u70ba<code>age<\/code>\u7684\u6574\u6578\u985e\u578b\u5217\uff1a<\/p>\n<pre><code>ALTER TABLE users\n    ADD age INT;\n<\/code><\/pre>\n<h2 id=\"%e5%88%aa%e9%99%a4%e5%88%97-VLwuZLsjbb\">\u522a\u9664\u5217<\/h2>\n<p>\u5982\u679c\u9700\u8981\u522a\u9664\u8868\u4e2d\u7684\u67d0\u4e00\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE table_name\n    DROP COLUMN column_name;\n<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e<code>users<\/code>\u8868\u4e2d\u522a\u9664<code>age<\/code>\u5217\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE users\n    DROP COLUMN age;\n<\/code><\/pre>\n<h2 id=\"%e4%bf%ae%e6%94%b9%e5%88%97%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-VLwuZLsjbb\">\u4fee\u6539\u5217\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u6709\u6642\u5019\uff0c\u53ef\u80fd\u9700\u8981\u4fee\u6539\u67d0\u4e00\u5217\u7684\u6578\u64da\u985e\u578b\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u8a9e\u6cd5\u5be6\u73fe\uff1a<\/p>\n<pre><code>ALTER TABLE table_name\n    MODIFY COLUMN column_name new_column_type;\n<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u5e0c\u671b\u5c07<code>users<\/code>\u8868\u4e2d\u7684<code>age<\/code>\u5217\u7684\u6578\u64da\u985e\u578b\u5f9e\u6574\u6578\u6539\u70ba\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE users\n    MODIFY COLUMN age VARCHAR(3);\n<\/code><\/pre>\n<h2 id=\"%e9%87%8d%e5%91%bd%e5%90%8d%e5%88%97-VLwuZLsjbb\">\u91cd\u547d\u540d\u5217<\/h2>\n<p>\u5982\u679c\u9700\u8981\u91cd\u547d\u540d\u8868\u4e2d\u7684\u67d0\u4e00\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE table_name\n    CHANGE old_column_name new_column_name column_type;\n<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07<code>users<\/code>\u8868\u4e2d\u7684<code>age<\/code>\u5217\u91cd\u547d\u540d\u70ba<code>user_age<\/code>\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE users\n    CHANGE age user_age INT;\n<\/code><\/pre>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e4%b8%bb%e9%8d%b5%e6%88%96%e7%b4%a2%e5%bc%95-VLwuZLsjbb\">\u6dfb\u52a0\u4e3b\u9375\u6216\u7d22\u5f15<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u70ba\u8868\u6dfb\u52a0\u4e3b\u9375\u6216\u7d22\u5f15\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u8a9e\u6cd5\u5be6\u73fe\uff1a<\/p>\n<pre><code>ALTER TABLE table_name\n    ADD PRIMARY KEY (column_name);\n<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07<code>users<\/code>\u8868\u4e2d\u7684<code>id<\/code>\u5217\u8a2d\u7f6e\u70ba\u4e3b\u9375\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE users\n    ADD PRIMARY KEY (id);\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-VLwuZLsjbb\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u7684ALTER TABLE\u8a9e\u53e5\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u65b9\u5f0f\u4f86\u4fee\u6539\u8868\u7684\u7d50\u69cb\u3002\u7121\u8ad6\u662f\u6dfb\u52a0\u3001\u522a\u9664\u9084\u662f\u4fee\u6539\u5217\uff0c\u9019\u4e9b\u64cd\u4f5c\u90fd\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u6839\u64da\u9700\u6c42\u8abf\u6574\u6578\u64da\u5eab\u8a2d\u8a08\u3002\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u9999\u6e2f\u7684\u865b\u64ec\u79c1\u4eba\u4f3a\u670d\u5668\u4e0a\u904b\u884cMySQL\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002\u7121\u8ad6\u662f\u9078\u64c7<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u9084\u662f<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u4ee5\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u4fee\u6539\u8868\u7684\u5be6\u969b\u61c9\u7528\u4ee3\u78bc\u793a\u4f8b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u66f4\u65b0\u3001\u6dfb\u52a0\u6216\u522a\u9664\u6578\u64da\u8868\u7d50\u69cb\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-77148","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77148","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=77148"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77148\/revisions"}],"predecessor-version":[{"id":77149,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77148\/revisions\/77149"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=77148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=77148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=77148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}