{"id":76804,"date":"2024-10-16T10:04:14","date_gmt":"2024-10-16T02:04:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76804\/"},"modified":"2024-10-16T10:04:15","modified_gmt":"2024-10-16T02:04:15","slug":"mysql%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5%e5%92%8c%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76804\/","title":{"rendered":"MySQL\u6dfb\u52a0\u5b57\u6bb5\u548c\u4fee\u6539\u5b57\u6bb5\u7684\u65b9\u6cd5"},"content":{"rendered":"<h1 id=\"mysql%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5%e5%92%8c%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e7%9a%84%e6%96%b9%e6%b3%95-jXRsSJtIGG\">MySQL\u6dfb\u52a0\u5b57\u6bb5\u548c\u4fee\u6539\u5b57\u6bb5\u7684\u65b9\u6cd5<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u6642\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u8868\u683c\u9032\u884c\u7d50\u69cb\u4e0a\u7684\u8abf\u6574\uff0c\u4f8b\u5982\u6dfb\u52a0\u65b0\u5b57\u6bb5\u6216\u4fee\u6539\u73fe\u6709\u5b57\u6bb5\u7684\u5c6c\u6027\u3002\u9019\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u901a\u904eSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\uff0c\u4ee5\u4e0b\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u5728MySQL\u4e2d\u6dfb\u52a0\u548c\u4fee\u6539\u5b57\u6bb5\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5-jXRsSJtIGG\">\u6dfb\u52a0\u5b57\u6bb5<\/h2>\n<p>\u8981\u5728MySQL\u4e2d\u6dfb\u52a0\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u3002\u9019\u500b\u8a9e\u53e5\u5141\u8a31\u7528\u6236\u5c0d\u73fe\u6709\u7684\u8868\u9032\u884c\u4fee\u6539\uff0c\u5305\u62ec\u6dfb\u52a0\u65b0\u5b57\u6bb5\u3002\u4ee5\u4e0b\u662f\u6dfb\u52a0\u5b57\u6bb5\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD \u5217\u540d \u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6];<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\uff0c\u6211\u5011\u60f3\u8981\u6dfb\u52a0\u4e00\u500b\u540d\u70ba\u201cage\u201d\u7684\u6574\u6578\u578b\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD age INT;<\/code><\/pre>\n<p>\u5982\u679c\u6211\u5011\u5e0c\u671b\u9019\u500b\u5b57\u6bb5\u4e0d\u5141\u8a31\u70baNULL\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD age INT NOT NULL;<\/code><\/pre>\n<h3 id=\"%e6%b7%bb%e5%8a%a0%e5%a4%9a%e5%80%8b%e5%ad%97%e6%ae%b5-jXRsSJtIGG\">\u6dfb\u52a0\u591a\u500b\u5b57\u6bb5<\/h3>\n<p>\u5982\u679c\u9700\u8981\u4e00\u6b21\u6027\u6dfb\u52a0\u591a\u500b\u5b57\u6bb5\uff0c\u53ef\u4ee5\u5728ADD\u5f8c\u9762\u5217\u51fa\u6240\u6709\u5b57\u6bb5\uff0c\u4f7f\u7528\u9017\u865f\u5206\u9694\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD (address VARCHAR(255), phone_number VARCHAR(15));<\/code><\/pre>\n<h2 id=\"%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5-jXRsSJtIGG\">\u4fee\u6539\u5b57\u6bb5<\/h2>\n<p>\u9664\u4e86\u6dfb\u52a0\u5b57\u6bb5\uff0cMySQL\u9084\u5141\u8a31\u7528\u6236\u4fee\u6539\u73fe\u6709\u5b57\u6bb5\u7684\u5c6c\u6027\u3002\u9019\u540c\u6a23\u662f\u901a\u904eALTER TABLE\u8a9e\u53e5\u4f86\u5be6\u73fe\uff0c\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d MODIFY \u5217\u540d \u65b0\u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6];<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u5c07\u201cage\u201d\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u5f9e\u6574\u6578\u578b\u6539\u70ba\u5c0f\u6578\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY age DECIMAL(3, 1);<\/code><\/pre>\n<h3 id=\"%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e5%90%8d%e7%a8%b1-jXRsSJtIGG\">\u4fee\u6539\u5b57\u6bb5\u540d\u7a31<\/h3>\n<p>\u5982\u679c\u9700\u8981\u4fee\u6539\u5b57\u6bb5\u7684\u540d\u7a31\uff0c\u53ef\u4ee5\u4f7f\u7528CHANGE\u95dc\u9375\u5b57\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d CHANGE \u820a\u5217\u540d \u65b0\u5217\u540d \u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6];<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5c07\u201cage\u201d\u5b57\u6bb5\u6539\u540d\u70ba\u201cuser_age\u201d\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE users CHANGE age user_age INT NOT NULL;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-jXRsSJtIGG\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u9032\u884c\u7d50\u69cb\u4fee\u6539\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li>\u67d0\u4e9b\u64cd\u4f5c\u53ef\u80fd\u6703\u5f71\u97ff\u5230\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u7279\u5225\u662f\u5728\u4fee\u6539\u5b57\u6bb5\u985e\u578b\u6642\uff0c\u9700\u8b39\u614e\u64cd\u4f5c\u3002<\/li>\n<li>\u5728\u6dfb\u52a0\u6216\u4fee\u6539\u5b57\u6bb5\u6642\uff0c\u61c9\u8003\u616e\u5230\u61c9\u7528\u7a0b\u5e8f\u7684\u517c\u5bb9\u6027\uff0c\u78ba\u4fdd\u4e0d\u6703\u5f71\u97ff\u5230\u73fe\u6709\u7684\u696d\u52d9\u908f\u8f2f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-jXRsSJtIGG\">\u7e3d\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u6dfb\u52a0\u548c\u4fee\u6539\u5b57\u6bb5\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u5e38\u898b\u7684\u64cd\u4f5c\u3002\u901a\u904e\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u9748\u6d3b\u5730\u8abf\u6574\u8868\u7684\u7d50\u69cb\uff0c\u4ee5\u6eff\u8db3\u4e0d\u65b7\u8b8a\u5316\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6dfb\u52a0\u65b0\u5b57\u6bb5\u9084\u662f\u4fee\u6539\u73fe\u6709\u5b57\u6bb5\uff0c\u4e86\u89e3\u6b63\u78ba\u7684\u8a9e\u6cd5\u548c\u6ce8\u610f\u4e8b\u9805\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u6dfb\u52a0\u548c\u4fee\u6539\u5b57\u6bb5\u7684\u65b9\u6cd5\uff0c\u638c\u63e1ALTER TABLE\u8bed\u53e5\uff0c\u8f7b\u677e\u7ba1\u7406\u6570\u636e\u5e93\u7ed3\u6784\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-76804","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76804","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=76804"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76804\/revisions"}],"predecessor-version":[{"id":76805,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76804\/revisions\/76805"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}