{"id":177597,"date":"2024-11-08T15:28:31","date_gmt":"2024-11-08T07:28:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177597\/"},"modified":"2024-11-08T15:28:32","modified_gmt":"2024-11-08T07:28:32","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41169-sqlstate-23000%ef%bc%88er_dup_unique%ef%bc%89%e7%94%b1%e4%ba%8e%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%ef%bc%8c%e7%84%a1%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177597\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41169 – SQLSTATE: 23000\uff08ER_DUP_UNIQUE\uff09\u7531\u4e8e\u552f\u4e00\u7d04\u675f\uff0c\u7121\u6cd5\u5411\u8868’%s’\u5beb\u5165"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41169 – SQLSTATE: 23000\uff08ER_DUP_UNIQUE\uff09<\/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\u8aa41169\uff0c\u8a72\u932f\u8aa4\u7684SQLSTATE\u4ee3\u78bc\u70ba23000\uff0c\u8868\u793a\u7531\u65bc\u552f\u4e00\u7d04\u675f\u7684\u539f\u56e0\uff0c\u7121\u6cd5\u5411\u8868\u4e2d\u5beb\u5165\u6578\u64da\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u6210\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u4fee\u5fa9\u5b83\u3002<\/p>\n

\u932f\u8aa41169\u7684\u6210\u56e0<\/h2>\n

\u932f\u8aa41169\u901a\u5e38\u767c\u751f\u5728\u5617\u8a66\u63d2\u5165\u6216\u66f4\u65b0\u4e00\u689d\u8a18\u9304\u6642\uff0c\u8a72\u8a18\u9304\u7684\u67d0\u500b\u5b57\u6bb5\u9055\u53cd\u4e86\u552f\u4e00\u7d04\u675f\u3002\u552f\u4e00\u7d04\u675f\u662f\u7528\u4f86\u78ba\u4fdd\u6578\u64da\u8868\u4e2d\u67d0\u4e00\u5217\u7684\u6240\u6709\u503c\u90fd\u662f\u552f\u4e00\u7684\uff0c\u9019\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u9632\u6b62\u91cd\u8907\u6578\u64da\u7684\u51fa\u73fe\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u7528\u6236\u8868\uff0c\u5176\u4e2d\u7684\u96fb\u5b50\u90f5\u4ef6\u5b57\u6bb5\u8a2d\u7f6e\u4e86\u552f\u4e00\u7d04\u675f\u3002\u5982\u679c\u4f60\u5617\u8a66\u63d2\u5165\u4e00\u500b\u5df2\u7d93\u5b58\u5728\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff0c\u5247\u6703\u51fa\u73fe\u932f\u8aa41169\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8bSQL\u8a9e\u53e5\uff1a<\/p>\n

INSERT INTO users (email, username) VALUES ('example@example.com', 'user1');<\/code><\/pre>\n
\u5982\u679c\u8a72\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u5df2\u7d93\u5b58\u5728\u65bc\u8868\u4e2d\uff0c\u5247\u6703\u5f15\u767c\u932f\u8aa41169\u3002<\/p>\n
\u5982\u4f55\u6aa2\u67e5\u552f\u4e00\u7d04\u675f<\/h2>\n
\u8981\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\uff0c\u9996\u5148\u9700\u8981\u6aa2\u67e5\u5c0e\u81f4\u932f\u8aa4\u7684\u552f\u4e00\u7d04\u675f\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u67e5\u770b\u8868\u7684\u7d50\u69cb\u548c\u7d04\u675f\uff1a<\/p>\n
SHOW CREATE TABLE users;<\/code><\/pre>\n
\u9019\u5c07\u986f\u793a\u8868\u7684\u5275\u5efa\u8a9e\u53e5\uff0c\u5305\u62ec\u6240\u6709\u7684\u7d04\u675f\u689d\u4ef6\u3002\u6aa2\u67e5\u8f38\u51fa\u4e2d\u662f\u5426\u6709\u552f\u4e00\u7d04\u675f\uff0c\u4e26\u78ba\u5b9a\u662f\u54ea\u4e00\u5217\u5c0e\u81f4\u4e86\u932f\u8aa4\u3002<\/p>\n
\u4fee\u5fa9\u932f\u8aa41169\u7684\u65b9\u6cd5<\/h2>\n
1. \u78ba\u4fdd\u6578\u64da\u552f\u4e00\u6027<\/h3>\n
\u6700\u76f4\u63a5\u7684\u89e3\u6c7a\u65b9\u6848\u662f\u78ba\u4fdd\u63d2\u5165\u6216\u66f4\u65b0\u7684\u6578\u64da\u662f\u552f\u4e00\u7684\u3002\u5728\u63d2\u5165\u6578\u64da\u4e4b\u524d\uff0c\u53ef\u4ee5\u5148\u67e5\u8a62\u8a72\u6578\u64da\u662f\u5426\u5df2\u5b58\u5728\uff1a<\/p>\n
SELECT * FROM users WHERE email = 'example@example.com';<\/code><\/pre>\n
\u5982\u679c\u67e5\u8a62\u7d50\u679c\u8fd4\u56de\u4e86\u6578\u64da\uff0c\u5247\u9700\u8981\u9078\u64c7\u4e0d\u540c\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u9032\u884c\u63d2\u5165\u3002<\/p>\n
2. \u66f4\u65b0\u73fe\u6709\u8a18\u9304<\/h3>\n
\u5982\u679c\u9700\u8981\u66f4\u65b0\u5df2\u5b58\u5728\u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528UPDATE\u8a9e\u53e5\u800c\u4e0d\u662fINSERT\u8a9e\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n
UPDATE users SET username = 'new_user' WHERE email = 'example@example.com';<\/code><\/pre>\n
3. \u522a\u9664\u91cd\u8907\u8a18\u9304<\/h3>\n
\u5982\u679c\u8868\u4e2d\u5b58\u5728\u91cd\u8907\u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u8003\u616e\u522a\u9664\u9019\u4e9b\u91cd\u8907\u7684\u6578\u64da\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u67e5\u627e\u91cd\u8907\u7684\u96fb\u5b50\u90f5\u4ef6\uff1a<\/p>\n
SELECT email, COUNT(*) FROM users GROUP BY email HAVING COUNT(*) > 1;<\/code><\/pre>\n
\u7136\u5f8c\u6839\u64da\u9700\u8981\u522a\u9664\u91cd\u8907\u7684\u8a18\u9304\u3002<\/p>\n
4. \u4fee\u6539\u552f\u4e00\u7d04\u675f<\/h3>\n
\u5982\u679c\u696d\u52d9\u9700\u6c42\u6539\u8b8a\uff0c\u53ef\u80fd\u9700\u8981\u4fee\u6539\u552f\u4e00\u7d04\u675f\u3002\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4f86\u522a\u9664\u6216\u4fee\u6539\u7d04\u675f\uff1a<\/p>\n
ALTER TABLE users DROP INDEX unique_email;<\/code><\/pre>\n
\u4e0d\u904e\uff0c\u9019\u7a2e\u65b9\u6cd5\u9700\u8981\u8b39\u614e\u4f7f\u7528\uff0c\u56e0\u70ba\u5b83\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
MySQL\u932f\u8aa41169\uff08SQLSTATE: 23000\uff09\u662f\u7531\u65bc\u552f\u4e00\u7d04\u675f\u5c0e\u81f4\u7684\u63d2\u5165\u6216\u66f4\u65b0\u5931\u6557\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u7684\u552f\u4e00\u6027\u3001\u66f4\u65b0\u73fe\u6709\u8a18\u9304\u3001\u522a\u9664\u91cd\u8907\u8a18\u9304\u6216\u4fee\u6539\u552f\u4e00\u7d04\u675f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\u3002\u4e86\u89e3\u5982\u4f55\u8655\u7406\u9019\u4e9b\u554f\u984c\u5c0d\u65bc\u7dad\u8b77\u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\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\u8aa41169\uff08ER_DUP_UNIQUE\uff09\u7684\u65b9\u6cd5\uff0c\u89e3\u6c7a\u56e0\u552f\u4e00\u7d04\u675f\u5c0e\u81f4\u7684\u5beb\u5165\u5931\u6557\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\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-177597","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177597","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=177597"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177597\/revisions"}],"predecessor-version":[{"id":177598,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177597\/revisions\/177598"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}