{"id":162969,"date":"2024-11-04T19:33:21","date_gmt":"2024-11-04T11:33:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162969\/"},"modified":"2024-11-04T19:33:22","modified_gmt":"2024-11-04T11:33:22","slug":"%e6%95%99%e6%82%a8%e4%bd%bf%e7%94%a8alter%e5%af%a6%e7%8f%bemysql%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162969\/","title":{"rendered":"\u6559\u60a8\u4f7f\u7528ALTER\u5be6\u73feMYSQL\u4fee\u6539\u8868\u7d50\u69cb"},"content":{"rendered":"<h1 id=\"%e6%95%99%e6%82%a8%e4%bd%bf%e7%94%a8alter%e5%af%a6%e7%8f%bemysql%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b-SDRiWbswti\">\u6559\u60a8\u4f7f\u7528ALTER\u5be6\u73feMYSQL\u4fee\u6539\u8868\u7d50\u69cb<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u6578\u64da\u8868\u7684\u7d50\u69cb\u9032\u884c\u8abf\u6574\u3002MySQL\u63d0\u4f9b\u4e86ALTER TABLE\u8a9e\u53e5\uff0c\u8b93\u7528\u6236\u80fd\u5920\u9748\u6d3b\u5730\u4fee\u6539\u8868\u7684\u7d50\u69cb\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528ALTER\u8a9e\u53e5\u4f86\u5be6\u73feMySQL\u7684\u8868\u7d50\u69cb\u4fee\u6539\uff0c\u4e26\u63d0\u4f9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"alter-table%e8%aa%9e%e5%8f%a5%e6%a6%82%e8%bf%b0-SDRiWbswti\">ALTER TABLE\u8a9e\u53e5\u6982\u8ff0<\/h2>\n<p>ALTER TABLE\u8a9e\u53e5\u662f\u7528\u65bc\u4fee\u6539\u5df2\u5b58\u5728\u7684\u6578\u64da\u8868\u7684\u7d50\u69cb\u3002\u901a\u904e\u9019\u500b\u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u9032\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li id=\"%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97-SDRiWbswti\">\u6dfb\u52a0\u65b0\u5217<\/li>\n<li id=\"%e5%88%aa%e9%99%a4%e7%8f%be%e6%9c%89%e5%88%97-SDRiWbswti\">\u522a\u9664\u73fe\u6709\u5217<\/li>\n<li 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-SDRiWbswti\">\u4fee\u6539\u5217\u7684\u6578\u64da\u985e\u578b<\/li>\n<li id=\"%e9%87%8d%e5%91%bd%e5%90%8d%e5%88%97%e6%88%96%e8%a1%a8-SDRiWbswti\">\u91cd\u547d\u540d\u5217\u6216\u8868<\/li>\n<li id=\"%e6%b7%bb%e5%8a%a0%e6%88%96%e5%88%aa%e9%99%a4%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6-SDRiWbswti\">\u6dfb\u52a0\u6216\u522a\u9664\u7d04\u675f\u689d\u4ef6<\/li>\n<\/ul>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97-SDRiWbswti\">\u6dfb\u52a0\u65b0\u5217<\/h2>\n<p>\u5982\u679c\u60a8\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 \u8868\u540d ADD \u5217\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u6dfb\u52a0\u4e00\u500b\u201cage\u201d\u5217\uff0c\u6578\u64da\u985e\u578b\u70ba\u6574\u6578\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD age INT;<\/code><\/pre>\n<h2 id=\"%e5%88%aa%e9%99%a4%e7%8f%be%e6%9c%89%e5%88%97-SDRiWbswti\">\u522a\u9664\u73fe\u6709\u5217<\/h2>\n<p>\u8981\u522a\u9664\u4e00\u500b\u5df2\u5b58\u5728\u7684\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP \u5217\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e\u201cusers\u201d\u8868\u4e2d\u522a\u9664\u201cage\u201d\u5217\uff0c\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n<pre><code>ALTER TABLE users DROP age;<\/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-SDRiWbswti\">\u4fee\u6539\u5217\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5982\u679c\u9700\u8981\u66f4\u6539\u67d0\u4e00\u5217\u7684\u6578\u64da\u985e\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d MODIFY \u5217\u540d \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07\u201cusers\u201d\u8868\u4e2d\u7684\u201cage\u201d\u5217\u7684\u6578\u64da\u985e\u578b\u6539\u70baVARCHAR\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY age VARCHAR(3);<\/code><\/pre>\n<h2 id=\"%e9%87%8d%e5%91%bd%e5%90%8d%e5%88%97%e6%88%96%e8%a1%a8-SDRiWbswti\">\u91cd\u547d\u540d\u5217\u6216\u8868<\/h2>\n<p>\u91cd\u547d\u540d\u5217\u6216\u8868\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d RENAME TO \u65b0\u8868\u540d;<\/code><\/pre>\n<p>\u82e5\u8981\u5c07\u201cusers\u201d\u8868\u91cd\u547d\u540d\u70ba\u201cmembers\u201d\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE users RENAME TO members;<\/code><\/pre>\n<p>\u82e5\u8981\u91cd\u547d\u540d\u201cage\u201d\u5217\u70ba\u201cuser_age\u201d\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE members CHANGE age user_age INT;<\/code><\/pre>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e6%88%96%e5%88%aa%e9%99%a4%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6-SDRiWbswti\">\u6dfb\u52a0\u6216\u522a\u9664\u7d04\u675f\u689d\u4ef6<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u60a8\u9084\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u4f86\u6dfb\u52a0\u6216\u522a\u9664\u7d04\u675f\u689d\u4ef6\uff0c\u4f8b\u5982\u4e3b\u9375\u3001\u5916\u9375\u7b49\u3002\u4ee5\u4e0b\u662f\u6dfb\u52a0\u4e3b\u9375\u7684\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD PRIMARY KEY (\u5217\u540d);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07\u201cmembers\u201d\u8868\u7684\u201cid\u201d\u5217\u8a2d\u7f6e\u70ba\u4e3b\u9375\uff1a<\/p>\n<pre><code>ALTER TABLE members ADD PRIMARY KEY (id);<\/code><\/pre>\n<p>\u8981\u522a\u9664\u4e3b\u9375\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP PRIMARY KEY;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-SDRiWbswti\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528ALTER TABLE\u9032\u884c\u8868\u7d50\u69cb\u4fee\u6539\u6642\uff0c\u8acb\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u5728\u9032\u884c\u7d50\u69cb\u4fee\u6539\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li>\u67d0\u4e9b\u64cd\u4f5c\u53ef\u80fd\u6703\u9396\u5b9a\u8868\uff0c\u5f71\u97ff\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u5728\u4f4e\u5cf0\u671f\u9032\u884c\u3002<\/li>\n<li>\u78ba\u4fdd\u65b0\u7d50\u69cb\u7b26\u5408\u696d\u52d9\u908f\u8f2f\uff0c\u907f\u514d\u56e0\u7d50\u69cb\u4e0d\u7576\u5c0e\u81f4\u7684\u6578\u64da\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SDRiWbswti\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u53ef\u4ee5\u9748\u6d3b\u5730\u4fee\u6539MySQL\u6578\u64da\u8868\u7684\u7d50\u69cb\uff0c\u5f9e\u800c\u6eff\u8db3\u4e0d\u65b7\u8b8a\u5316\u7684\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6dfb\u52a0\u65b0\u5217\u3001\u522a\u9664\u5217\uff0c\u9084\u662f\u4fee\u6539\u6578\u64da\u985e\u578b\uff0c\u9019\u4e9b\u64cd\u4f5c\u90fd\u80fd\u5920\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u548c\u670d\u52d9\u5668\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528ALTER\u8a9e\u53e5\u5728MySQL\u4e2d\u4fee\u6539\u8868\u7d50\u69cb\uff0c\u8f15\u9b06\u8abf\u6574\u6b04\u4f4d\u3001\u7d22\u5f15\u548c\u7d04\u675f\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\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-162969","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162969","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=162969"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162969\/revisions"}],"predecessor-version":[{"id":162970,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162969\/revisions\/162970"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}