{"id":6242,"date":"2024-11-14T12:30:41","date_gmt":"2024-11-14T04:30:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6242\/"},"modified":"2024-11-14T12:30:41","modified_gmt":"2024-11-14T04:30:41","slug":"mysql%e5%a6%82%e4%bd%95%e8%ae%be%e7%bd%ae%e4%b8%bb%e9%94%ae","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6242\/","title":{"rendered":"mysql\u5982\u4f55\u8bbe\u7f6e\u4e3b\u952e"},"content":{"rendered":"<blockquote><p>\n  mysql \u4e2d\u7684\u4e3b\u952e\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u8bbe\u7f6e\uff1a\u5728 create table \u8bed\u53e5\u4e2d\u6307\u5b9a primary key \u5b50\u53e5\uff1b\u4f7f\u7528 alter table \u8bed\u53e5\u6dfb\u52a0\u4e3b\u952e\uff1b\u4f7f\u7528 add constraint \u8bed\u53e5\u6dfb\u52a0\u4e3b\u952e\uff08\u53ef\u9009\uff0c\u6307\u5b9a\u7ea6\u675f\u540d\u79f0\uff09\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202406\/15\/2024061516032625103.jpg\" class=\"aligncenter\" title=\"mysql\u5982\u4f55\u8bbe\u7f6e\u4e3b\u952e\u63d2\u56fe\" alt=\"mysql\u5982\u4f55\u8bbe\u7f6e\u4e3b\u952e\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 MySQL \u4e2d\u8bbe\u7f6e\u4e3b\u952e<\/strong><\/p>\n<p>MySQL \u4e2d\u7684\u4e3b\u952e\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\u3002\u4e3b\u952e\u662f\u4e00\u4e2a\u6216\u591a\u4e2a\u5217\u7684\u7ec4\u5408\uff0c\u8fd9\u4e9b\u5217\u7684\u503c\u5728\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\u4e2d\u90fd\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002<\/p>\n<p><strong>\u8bbe\u7f6e\u4e3b\u952e\u7684\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li><strong>\u5728 CREATE TABLE \u8bed\u53e5\u4e2d\u6307\u5b9a\u4e3b\u952e\uff1a<\/strong><\/li>\n<\/ol>\n<pre>CREATE TABLE table_name (\n  column1 datatype,\n  column2 datatype,\n  PRIMARY KEY (column_name)\n);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d column_name \u662f\u8981\u4f5c\u4e3a\u4e3b\u952e\u7684\u5217\u3002<\/p>\n<ol>\n<li><strong>\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u6dfb\u52a0\u4e3b\u952e\uff1a<\/strong><\/li>\n<\/ol>\n<pre>ALTER TABLE table_name ADD PRIMARY KEY (column_name);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ol>\n<li><strong>\u4f7f\u7528 ADD CONSTRAINT \u8bed\u53e5\u6dfb\u52a0\u4e3b\u952e\uff1a<\/strong><\/li>\n<\/ol>\n<pre>ALTER TABLE table_name ADD CONSTRAINT pk_name PRIMARY KEY (column_name);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d pk_name \u662f\u4e3b\u952e\u7684\u7ea6\u675f\u540d\u79f0\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u4e3b\u952e\u5217\u53ef\u4ee5\u662f NOT NULL\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002<\/li>\n<li>\u8054\u5408\u4e3b\u952e\u53ef\u4ee5\u7531\u591a\u4e2a\u5217\u7ec4\u6210\u3002<\/li>\n<li>\u8bbe\u7f6e\u4e3b\u952e\u540e\uff0cMySQL \u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u552f\u4e00\u7d22\u5f15\u4ee5\u5f3a\u5236\u552f\u4e00\u6027\u7ea6\u675f\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u8bbe\u7f6e\u4e3b\u952e\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mysql \u4e2d\u7684\u4e3b\u952e\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u8bbe\u7f6e\uff1a\u5728 create table \u8bed\u53e5\u4e2d\u6307\u5b9a primary key \u5b50\u53e5\uff1b\u4f7f\u7528 alter table \u8bed\u53e5\u6dfb\u52a0\u4e3b\u952e\uff1b\u4f7f\u7528 add constraint \u8bed\u53e5\u6dfb\u52a0\u4e3b\u952e\uff08\u53ef\u9009\uff0c\u6307\u5b9a\u7ea6\u675f\u540d\u79f0\uff09\u3002 \u5982\u4f55\u5728 MySQL \u4e2d\u8bbe\u7f6e\u4e3b\u952e MySQL \u4e2d\u7684\u4e3b\u952e\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\u3002\u4e3b\u952e\u662f\u4e00\u4e2a\u6216\u591a\u4e2a\u5217\u7684\u7ec4\u5408\uff0c\u8fd9\u4e9b\u5217\u7684\u503c\u5728\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\u4e2d\u90fd\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002 \u8bbe\u7f6e\u4e3b\u952e\u7684\u6b65\u9aa4\uff1a \u5728 CREATE TABLE \u8bed\u53e5\u4e2d\u6307\u5b9a\u4e3b\u952e\uff1a CREATE TABLE table_name ( column1 datatype, column2 datatype, PRIMARY KEY (column_name) ); \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d column_name \u662f\u8981\u4f5c\u4e3a\u4e3b\u952e\u7684\u5217\u3002 \u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u6dfb\u52a0\u4e3b\u952e\uff1a ALTER TABLE table_name ADD PRIMARY KEY (column_name); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 ADD CONSTRAINT [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-6242","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6242","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=6242"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6242\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6242"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}