{"id":177157,"date":"2024-11-08T13:49:24","date_gmt":"2024-11-08T05:49:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177157\/"},"modified":"2024-11-08T13:49:25","modified_gmt":"2024-11-08T05:49:25","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41068-sql%e7%8b%80%e6%85%8b%ef%bc%9a42000%ef%bc%88er_multiple_pri_key%ef%bc%89%e5%ae%9a%e7%be%a9%e4%ba%86%e5%a4%9a%e5%80%8b%e4%b8%bb","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177157\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41068 – SQL\u72c0\u614b\uff1a42000\uff08ER_MULTIPLE_PRI_KEY\uff09\u5b9a\u7fa9\u4e86\u591a\u500b\u4e3b\u9375"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41068 – SQL\u72c0\u614b\uff1a42000\uff08ER_MULTIPLE_PRI_KEY\uff09\u5b9a\u7fa9\u4e86\u591a\u500b\u4e3b\u9375<\/h1>\n

\u5728\u4f7f\u7528MySQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa41068\uff0c\u8a72\u932f\u8aa4\u7684SQL\u72c0\u614b\u70ba42000\uff0c\u8868\u793a\u5b9a\u7fa9\u4e86\u591a\u500b\u4e3b\u9375\u3002\u9019\u500b\u554f\u984c\u901a\u5e38\u767c\u751f\u5728\u5275\u5efa\u6216\u4fee\u6539\u8868\u6642\uff0c\u7576\u4f60\u5617\u8a66\u5728\u540c\u4e00\u500b\u8868\u4e2d\u5b9a\u7fa9\u591a\u500b\u4e3b\u9375\u6642\uff0cMySQL\u6703\u5831\u544a\u6b64\u932f\u8aa4\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n

\u932f\u8aa4\u539f\u56e0<\/h2>\n

\u5728MySQL\u4e2d\uff0c\u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b\u4e3b\u9375\u3002\u4e3b\u9375\u7684\u4e3b\u8981\u529f\u80fd\u662f\u552f\u4e00\u6a19\u8b58\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u6578\u64da\uff0c\u4e26\u4e14\u4e3b\u9375\u7684\u503c\u4e0d\u80fd\u70baNULL\u3002\u5982\u679c\u4f60\u5728\u5275\u5efa\u8868\u6216\u4fee\u6539\u8868\u7d50\u69cb\u6642\uff0c\u610f\u5916\u5730\u5b9a\u7fa9\u4e86\u591a\u500b\u4e3b\u9375\uff0c\u5c31\u6703\u5c0e\u81f4\u932f\u8aa41068\u7684\u51fa\u73fe\u3002<\/p>\n

\u4f8b\u5982\uff0c\u4ee5\u4e0bSQL\u8a9e\u53e5\u5c07\u6703\u5f15\u767c\u932f\u8aa41068\uff1a<\/p>\n

CREATE TABLE users (\n    id INT NOT NULL,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL,\n    PRIMARY KEY (id),\n    PRIMARY KEY (username)\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u8a66\u5716\u5728\u540c\u4e00\u500b\u8868\u4e2d\u5b9a\u7fa9\u5169\u500b\u4e3b\u9375\uff08id\u548cusername\uff09\uff0c\u9019\u662f\u9055\u53cdMySQL\u7684\u898f\u5247\u7684\u3002<\/p>\n
\u5982\u4f55\u4fee\u5fa9\u932f\u8aa41068<\/h2>\n
\u8981\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\uff0c\u9996\u5148\u9700\u8981\u6aa2\u67e5\u4f60\u7684SQL\u8a9e\u53e5\uff0c\u78ba\u4fdd\u6bcf\u500b\u8868\u53ea\u5b9a\u7fa9\u4e00\u500b\u4e3b\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n
1. \u79fb\u9664\u591a\u9918\u7684\u4e3b\u9375\u5b9a\u7fa9<\/h3>\n
\u5982\u679c\u4f60\u767c\u73fe\u4e86\u591a\u500b\u4e3b\u9375\u5b9a\u7fa9\uff0c\u5247\u9700\u8981\u522a\u9664\u591a\u9918\u7684\u4e3b\u9375\u3002\u4f8b\u5982\uff0c\u5c07\u4e0a\u9762\u7684SQL\u8a9e\u53e5\u4fee\u6539\u70ba\uff1a<\/p>\n
CREATE TABLE users (\n    id INT NOT NULL,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL,\n    PRIMARY KEY (id)\n);<\/code><\/pre>\n
\u9019\u6a23\u5c31\u53ea\u5b9a\u7fa9\u4e86\u4e00\u500b\u4e3b\u9375\uff0c\u932f\u8aa41068\u5c07\u4e0d\u518d\u51fa\u73fe\u3002<\/p>\n
2. \u4f7f\u7528\u552f\u4e00\u7d22\u5f15<\/h3>\n
\u5982\u679c\u4f60\u9700\u8981\u78ba\u4fdd\u67d0\u500b\u5b57\u6bb5\u7684\u552f\u4e00\u6027\uff0c\u4f46\u4e0d\u5e0c\u671b\u5c07\u5176\u8a2d\u7f6e\u70ba\u4e3b\u9375\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u552f\u4e00\u7d22\u5f15\u3002\u4f8b\u5982\uff1a<\/p>\n
CREATE TABLE users (\n    id INT NOT NULL,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL,\n    PRIMARY KEY (id),\n    UNIQUE (username)\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cid\u4ecd\u7136\u662f\u4e3b\u9375\uff0c\u800cusername\u5247\u88ab\u8a2d\u7f6e\u70ba\u552f\u4e00\u7d22\u5f15\uff0c\u9019\u6a23\u53ef\u4ee5\u4fdd\u8b49username\u7684\u552f\u4e00\u6027\uff0c\u540c\u6642\u4e0d\u6703\u5f15\u767c\u932f\u8aa41068\u3002<\/p>\n
3. \u4fee\u6539\u73fe\u6709\u8868\u7d50\u69cb<\/h3>\n
\u5982\u679c\u4f60\u5df2\u7d93\u6709\u4e00\u500b\u8868\u4e26\u4e14\u9700\u8981\u4fee\u6539\u5176\u7d50\u69cb\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4f86\u522a\u9664\u591a\u9918\u7684\u4e3b\u9375\u3002\u4f8b\u5982\uff1a<\/p>\n
ALTER TABLE users DROP PRIMARY KEY, ADD PRIMARY KEY (id);<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u4e3b\u9375\u5b58\u5728\u65bc\u8868\u4e2d\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
MySQL\u932f\u8aa41068\uff08ER_MULTIPLE_PRI_KEY\uff09\u662f\u7531\u65bc\u5728\u540c\u4e00\u500b\u8868\u4e2d\u5b9a\u7fa9\u4e86\u591a\u500b\u4e3b\u9375\u800c\u5f15\u8d77\u7684\u3002\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u958b\u767c\u8005\u9700\u8981\u6aa2\u67e5SQL\u8a9e\u53e5\uff0c\u78ba\u4fdd\u6bcf\u500b\u8868\u53ea\u5b9a\u7fa9\u4e00\u500b\u4e3b\u9375\uff0c\u4e26\u6839\u64da\u9700\u8981\u4f7f\u7528\u552f\u4e00\u7d22\u5f15\u4f86\u4fdd\u6301\u6578\u64da\u7684\u552f\u4e00\u6027\u3002\u901a\u904e\u6b63\u78ba\u7684\u6578\u64da\u5eab\u8a2d\u8a08\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6b64\u985e\u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\uff0c\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u7db2\u7ad9\u6258\u7ba1\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4fee\u5fa9MySQL\u932f\u8aa41068\uff08ER_MULTIPLE_PRI_KEY\uff09\u7684\u65b9\u6cd5\uff0c\u89e3\u91cb\u5982\u4f55\u8655\u7406\u5b9a\u7fa9\u591a\u500b\u4e3b\u9375\u7684\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u6b63\u5e38\u904b\u884c\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-177157","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177157","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=177157"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177157\/revisions"}],"predecessor-version":[{"id":177158,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177157\/revisions\/177158"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177157"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}