{"id":162857,"date":"2024-11-04T18:36:17","date_gmt":"2024-11-04T10:36:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162857\/"},"modified":"2024-11-04T18:36:18","modified_gmt":"2024-11-04T10:36:18","slug":"%e6%95%99%e4%bd%a0%e5%a6%82%e4%bd%95%e5%9c%a8mysql%e4%b8%ad%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%ef%bc%88mysql%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162857\/","title":{"rendered":"\u6559\u4f60\u5982\u4f55\u5728MySQL\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff08MySQL\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%99%e4%bd%a0%e5%a6%82%e4%bd%95%e5%9c%a8mysql%e4%b8%ad%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-zRwXuKvPBe\">\u6559\u4f60\u5982\u4f55\u5728MySQL\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u985e\u578b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u64cd\u4f5c\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u53ef\u80fd\u9700\u8981\u5c0d\u5df2\u5b58\u5728\u7684\u6578\u64da\u985e\u578b\u9032\u884c\u4fee\u6539\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728MySQL\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u7684\u6578\u64da\u985e\u578b\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u6b65\u9a5f\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-zRwXuKvPBe\">\u70ba\u4ec0\u9ebc\u9700\u8981\u4fee\u6539\u6578\u64da\u985e\u578b<\/h2>\n<p>\u6578\u64da\u985e\u578b\u7684\u4fee\u6539\u901a\u5e38\u662f\u7531\u65bc\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u696d\u52d9\u9700\u6c42\u8b8a\u66f4\uff1a<\/strong>\u96a8\u8457\u696d\u52d9\u7684\u767c\u5c55\uff0c\u539f\u6709\u7684\u6578\u64da\u985e\u578b\u53ef\u80fd\u7121\u6cd5\u6eff\u8db3\u65b0\u7684\u9700\u6c42\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u67d0\u4e9b\u6578\u64da\u985e\u578b\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u901a\u904e\u4fee\u6539\u6578\u64da\u985e\u578b\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li><strong>\u6578\u64da\u4e00\u81f4\u6027\uff1a<\/strong>\u70ba\u4e86\u4fdd\u6301\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u53ef\u80fd\u9700\u8981\u5c07\u67d0\u4e9b\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u7d71\u4e00\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-zRwXuKvPBe\">\u4fee\u6539\u6578\u64da\u985e\u578b\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u4fee\u6539\u6578\u64da\u985e\u578b\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d MODIFY COLUMN \u5217\u540d \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u7684\u542b\u7fa9\u662f\uff1a\u5c0d\u6307\u5b9a\u7684\u8868\u9032\u884c\u4fee\u6539\uff0c\u5c07\u67d0\u4e00\u5217\u7684\u6578\u64da\u985e\u578b\u66f4\u6539\u70ba\u65b0\u7684\u6578\u64da\u985e\u578b\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%93%8d%e4%bd%9c%e7%a4%ba%e4%be%8b-zRwXuKvPBe\">\u5be6\u969b\u64cd\u4f5c\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u8a72\u8868\u4e2d\u6709\u4e00\u500b <code>age<\/code> \u5217\uff0c\u5176\u6578\u64da\u985e\u578b\u70ba <code>INT<\/code>\uff0c\u73fe\u5728\u6211\u5011\u5e0c\u671b\u5c07\u5176\u4fee\u6539\u70ba <code>TINYINT<\/code>\uff0c\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY COLUMN age TINYINT;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c<code>age<\/code> \u5217\u7684\u6578\u64da\u985e\u578b\u5c07\u88ab\u4fee\u6539\u70ba <code>TINYINT<\/code>\u3002<\/p>\n<h3 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-zRwXuKvPBe\">\u6ce8\u610f\u4e8b\u9805<\/h3>\n<p>\u5728\u4fee\u6539\u6578\u64da\u985e\u578b\u4e4b\u524d\uff0c\u8acb\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u517c\u5bb9\u6027\uff1a<\/strong>\u78ba\u4fdd\u65b0\u6578\u64da\u985e\u578b\u80fd\u5920\u517c\u5bb9\u73fe\u6709\u6578\u64da\uff0c\u5426\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\u6216\u932f\u8aa4\u3002<\/li>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\u7d50\u69cb\u6027\u4fee\u6539\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u60c5\u6cc1\u767c\u751f\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u74b0\u5883\uff1a<\/strong>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u9032\u884c\u4fee\u6539\u4e4b\u524d\uff0c\u6700\u597d\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u9032\u884c\u9a57\u8b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%85%b6%e4%bb%96%e5%b8%b8%e8%a6%8b%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e4%bf%ae%e6%94%b9%e7%a4%ba%e4%be%8b-zRwXuKvPBe\">\u5176\u4ed6\u5e38\u898b\u7684\u6578\u64da\u985e\u578b\u4fee\u6539\u793a\u4f8b<\/h2>\n<p>\u9664\u4e86\u4fee\u6539\u6574\u6578\u985e\u578b\uff0c\u9084\u53ef\u4ee5\u4fee\u6539\u5176\u4ed6\u985e\u578b\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5c07 <code>VARCHAR(255)<\/code> \u4fee\u6539\u70ba <code>TEXT<\/code>\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY COLUMN description TEXT;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u64f4\u5c55 <code>description<\/code> \u5217\u7684\u5b58\u5132\u5bb9\u91cf\uff0c\u4ee5\u4fbf\u5b58\u5132\u66f4\u9577\u7684\u6587\u672c\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-zRwXuKvPBe\">\u7d50\u8ad6<\/h2>\n<p>\u5728MySQL\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u4f46\u9700\u8981\u8b39\u614e\u64cd\u4f5c\u4ee5\u907f\u514d\u6578\u64da\u4e1f\u5931\u6216\u932f\u8aa4\u3002\u901a\u904e\u6b63\u78ba\u7684\u8a9e\u6cd5\u548c\u6b65\u9a5f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u8abf\u6574\u6578\u64da\u7d50\u69cb\u4ee5\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u5c07\u6709\u52a9\u65bc\u63d0\u5347\u60a8\u7684\u696d\u52d9\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728MySQL\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff0c\u638c\u63e1\u7c21\u55ae\u6b65\u9a5f\u548c\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\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-162857","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162857","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=162857"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162857\/revisions"}],"predecessor-version":[{"id":162858,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162857\/revisions\/162858"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}