{"id":217774,"date":"2023-12-23T00:02:18","date_gmt":"2023-12-22T16:02:18","guid":{"rendered":"https:\/\/www.idc.net\/help\/217774\/"},"modified":"2023-12-23T00:02:18","modified_gmt":"2023-12-22T16:02:18","slug":"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8alter-table-table-modify-column-column-type%e6%9b%b4%e6%94%b9%e5%88%97%e7%9a%84%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217774\/","title":{"rendered":"MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528ALTER TABLE [table] MODIFY COLUMN column type\u66f4\u6539\u5217\u7684\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"<p><title id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8alter-table-table-modify-column-column-type%e6%9b%b4%e6%94%b9%e5%88%97%e7%9a%84%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b-RPuysYlaSj\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528ALTER TABLE [table] MODIFY COLUMN column type\u66f4\u6539\u5217\u7684\u6570\u636e\u7c7b\u578b<\/title><\/p>\n<h1 id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8alter-table-table-modify-column-column-type%e6%9b%b4%e6%94%b9%e5%88%97%e7%9a%84%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b-RPuysYlaSj\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528ALTER TABLE [table] MODIFY COLUMN column type\u66f4\u6539\u5217\u7684\u6570\u636e\u7c7b\u578b<\/h1>\n<p>\u5728MySQL\u6570\u636e\u5e93\u4e2d\uff0cALTER TABLE\u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u5df2\u5b58\u5728\u7684\u8868\u7684\u7ed3\u6784\u3002\u5176\u4e2d\uff0cALTER TABLE [table] MODIFY COLUMN\u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u8868\u4e2d\u67d0\u4e00\u5217\u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-RPuysYlaSj\">\u8bed\u6cd5<\/h2>\n<p>ALTER TABLE [table] MODIFY COLUMN [column] [type];<\/p>\n<h2 id=\"%e5%8f%82%e6%95%b0%e8%af%b4%e6%98%8e-RPuysYlaSj\">\u53c2\u6570\u8bf4\u660e<\/h2>\n<ul>\n<li>[table]: \u8981\u4fee\u6539\u7684\u8868\u540d\u3002<\/li>\n<li>[column]: \u8981\u4fee\u6539\u7684\u5217\u540d\u3002<\/li>\n<li>[type]: \u8981\u4fee\u6539\u7684\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b-RPuysYlaSj\">\u793a\u4f8b<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a\"users\"\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\"age\"\u5217\uff0c\u6570\u636e\u7c7b\u578b\u4e3aINT\u3002\u73b0\u5728\u6211\u4eec\u60f3\u5c06\"age\"\u5217\u7684\u6570\u636e\u7c7b\u578b\u4fee\u6539\u4e3aVARCHAR(50)\u3002<\/p>\n<pre><code>ALTER TABLE users MODIFY COLUMN age VARCHAR(50);\n<\/code><\/pre>\n<p>\u6267\u884c\u4ee5\u4e0a\u8bed\u53e5\u540e\uff0c\"users\"\u8868\u4e2d\u7684\"age\"\u5217\u7684\u6570\u636e\u7c7b\u578b\u5c06\u88ab\u4fee\u6539\u4e3aVARCHAR(50)\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9-RPuysYlaSj\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n<ul>\n<li>\u5728\u4f7f\u7528ALTER TABLE MODIFY COLUMN\u8bed\u53e5\u65f6\uff0c\u9700\u8981\u786e\u4fdd\u8868\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u6216\u8005\u4fee\u6539\u540e\u7684\u6570\u636e\u7c7b\u578b\u80fd\u591f\u5bb9\u7eb3\u539f\u6709\u6570\u636e\u3002<\/li>\n<li>\u4fee\u6539\u5217\u7684\u6570\u636e\u7c7b\u578b\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u6216\u622a\u65ad\uff0c\u56e0\u6b64\u5728\u6267\u884c\u6b64\u64cd\u4f5c\u4e4b\u524d\uff0c\u8bf7\u52a1\u5fc5\u5907\u4efd\u6570\u636e\u3002<\/li>\n<li>\u9664\u4e86\u4fee\u6539\u6570\u636e\u7c7b\u578b\uff0cALTER TABLE MODIFY COLUMN\u8bed\u53e5\u8fd8\u53ef\u4ee5\u7528\u4e8e\u4fee\u6539\u5217\u7684\u5176\u4ed6\u5c5e\u6027\uff0c\u5982\u5217\u540d\u3001\u9ed8\u8ba4\u503c\u3001\u7ea6\u675f\u7b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%80%bb%e7%bb%93-RPuysYlaSj\">\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528MySQL\u7684ALTER TABLE MODIFY COLUMN\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u4fee\u6539\u8868\u4e2d\u67d0\u4e00\u5217\u7684\u6570\u636e\u7c7b\u578b\u3002\u8fd9\u5bf9\u4e8e\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u6570\u636e\u7c7b\u578b\u4e0d\u5408\u9002\u6216\u9700\u8981\u66f4\u6539\u7684\u60c5\u51b5\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>\u9999\u6e2f\u670d\u52a1\u5668\u9996\u9009\u540e\u6d6a\u4e91\uff0c\u63d0\u4f9b\u7a33\u5b9a\u53ef\u9760\u7684\u4e91\u8ba1\u7b97\u670d\u52a1\u3002\u5982\u679c\u60a8\u9700\u8981\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u53ef\u4ee5\u8bbf\u95ee<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a>\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528ALTER TABLE [table] MODIFY COLUMN column ty [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217774","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217774","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217774"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217774\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}