{"id":76700,"date":"2024-10-16T09:05:16","date_gmt":"2024-10-16T01:05:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76700\/"},"modified":"2024-10-16T09:05:16","modified_gmt":"2024-10-16T01:05:16","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adprimary-key%e9%87%8d%e8%a4%87%e8%99%95%e7%90%863%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76700\/","title":{"rendered":"MySQL\u6578\u64da\u5eab\u4e2dPRIMARY KEY\u91cd\u8907\u8655\u74063\u65b9\u6848"},"content":{"rendered":"

MySQL\u6578\u64da\u5eab\u4e2dPRIMARY KEY\u91cd\u8907\u8655\u74063\u65b9\u6848<\/h1>\n

\u5728MySQL\u6578\u64da\u5eab\u4e2d\uff0cPRIMARY KEY\uff08\u4e3b\u9375\uff09\u662f\u7528\u4f86\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u884c\u6578\u64da\u7684\u91cd\u8981\u5143\u7d20\u3002\u7576\u6211\u5011\u5617\u8a66\u63d2\u5165\u4e00\u689d\u5df2\u5b58\u5728\u7684\u4e3b\u9375\u6578\u64da\u6642\uff0c\u6703\u9047\u5230\u91cd\u8907\u4e3b\u9375\u7684\u554f\u984c\u3002\u9019\u4e0d\u50c5\u6703\u5c0e\u81f4\u932f\u8aa4\uff0c\u9084\u53ef\u80fd\u5f71\u97ff\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e09\u7a2e\u8655\u7406MySQL\u4e2dPRIMARY KEY\u91cd\u8907\u7684\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002<\/p>\n

\u65b9\u6848\u4e00\uff1a\u4f7f\u7528INSERT IGNORE<\/h2>\n

\u7576\u6211\u5011\u5e0c\u671b\u5728\u63d2\u5165\u6578\u64da\u6642\u5ffd\u7565\u91cd\u8907\u7684\u4e3b\u9375\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528INSERT IGNORE\u8a9e\u53e5\u3002\u9019\u7a2e\u65b9\u6cd5\u6703\u5728\u9047\u5230\u91cd\u8907\u4e3b\u9375\u6642\u81ea\u52d5\u5ffd\u7565\u8a72\u63d2\u5165\u64cd\u4f5c\uff0c\u800c\u4e0d\u6703\u5831\u932f\u3002<\/p>\n

INSERT IGNORE INTO \u8868\u540d (\u4e3b\u9375, \u52171, \u52172) VALUES (\u503c1, \u503c2, \u503c3);<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70bausers\u7684\u8868\uff0c\u4e3b\u9375\u70bauser_id\uff0c\u7576\u6211\u5011\u63d2\u5165\u4e00\u500b\u5df2\u5b58\u5728\u7684user_id\u6642\uff0c\u8a72\u64cd\u4f5c\u5c07\u88ab\u5ffd\u7565\uff1a<\/p>\n
INSERT IGNORE INTO users (user_id, name) VALUES (1, 'Alice');<\/code><\/pre>\n
\u5982\u679cuser_id\u70ba1\u7684\u8a18\u9304\u5df2\u5b58\u5728\uff0c\u5247\u9019\u689d\u8a9e\u53e5\u4e0d\u6703\u5c0d\u6578\u64da\u5eab\u9020\u6210\u4efb\u4f55\u5f71\u97ff\u3002<\/p>\n
\u65b9\u6848\u4e8c\uff1a\u4f7f\u7528ON DUPLICATE KEY UPDATE<\/h2>\n
\u53e6\u4e00\u7a2e\u8655\u7406\u91cd\u8907\u4e3b\u9375\u7684\u65b9\u6cd5\u662f\u4f7f\u7528ON DUPLICATE KEY UPDATE\u8a9e\u53e5\u3002\u9019\u7a2e\u65b9\u6cd5\u5141\u8a31\u6211\u5011\u5728\u63d2\u5165\u91cd\u8907\u4e3b\u9375\u6642\uff0c\u66f4\u65b0\u5df2\u5b58\u5728\u7684\u8a18\u9304\uff0c\u800c\u4e0d\u662f\u7c21\u55ae\u5730\u5ffd\u7565\u5b83\u3002<\/p>\n
INSERT INTO \u8868\u540d (\u4e3b\u9375, \u52171, \u52172) VALUES (\u503c1, \u503c2, \u503c3) \nON DUPLICATE KEY UPDATE \u52171 = \u503c2, \u52172 = \u503c3;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5c0d\u65bcusers\u8868\uff0c\u5982\u679c\u6211\u5011\u5e0c\u671b\u5728user_id\u70ba1\u7684\u8a18\u9304\u5df2\u5b58\u5728\u6642\u66f4\u65b0\u5176name\u6b04\u4f4d\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n
INSERT INTO users (user_id, name) VALUES (1, 'Alice') \nON DUPLICATE KEY UPDATE name = 'Alice';<\/code><\/pre>\n
\u9019\u6a23\uff0c\u5982\u679cuser_id\u70ba1\u7684\u8a18\u9304\u5df2\u5b58\u5728\uff0c\u5247\u6703\u66f4\u65b0\u5176name\u6b04\u4f4d\u70ba’Alice’\u3002<\/p>\n
\u65b9\u6848\u4e09\uff1a\u4f7f\u7528REPLACE INTO<\/h2>\n
REPLACE INTO\u8a9e\u53e5\u662f\u4e00\u7a2e\u66ff\u4ee3\u63d2\u5165\u7684\u65b9\u5f0f\uff0c\u7576\u9047\u5230\u91cd\u8907\u4e3b\u9375\u6642\uff0c\u6703\u5148\u522a\u9664\u5df2\u5b58\u5728\u7684\u8a18\u9304\uff0c\u7136\u5f8c\u63d2\u5165\u65b0\u7684\u8a18\u9304\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u9700\u8981\u5b8c\u5168\u66ff\u63db\u820a\u6578\u64da\u7684\u60c5\u6cc1\u3002<\/p>\n
REPLACE INTO \u8868\u540d (\u4e3b\u9375, \u52171, \u52172) VALUES (\u503c1, \u503c2, \u503c3);<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5c0d\u65bcusers\u8868\uff0c\u5982\u679c\u6211\u5011\u5e0c\u671b\u7528\u65b0\u7684\u6578\u64da\u66ff\u63dbuser_id\u70ba1\u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n
REPLACE INTO users (user_id, name) VALUES (1, 'Alice');<\/code><\/pre>\n
\u9019\u6a23\uff0c\u5982\u679cuser_id\u70ba1\u7684\u8a18\u9304\u5df2\u5b58\u5728\uff0c\u5247\u6703\u88ab\u522a\u9664\u4e26\u63d2\u5165\u65b0\u7684\u8a18\u9304\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728MySQL\u6578\u64da\u5eab\u4e2d\u8655\u7406PRIMARY KEY\u91cd\u8907\u7684\u554f\u984c\u6709\u591a\u7a2e\u65b9\u6848\uff0c\u5305\u62ec\u4f7f\u7528INSERT IGNORE\u3001ON DUPLICATE KEY UPDATE\u548cREPLACE INTO\u3002\u6839\u64da\u5177\u9ad4\u9700\u6c42\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u6cd5\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u7121\u8ad6\u662f\u9078\u64c7\u5ffd\u7565\u91cd\u8907\u3001\u66f4\u65b0\u73fe\u6709\u8a18\u9304\uff0c\u9084\u662f\u66ff\u63db\u820a\u6578\u64da\uff0c\u9019\u4e9b\u65b9\u6cd5\u90fd\u80fd\u6709\u6548\u5730\u89e3\u6c7a\u91cd\u8907\u4e3b\u9375\u7684\u554f\u984c\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u7ba1\u7406\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0cServer.HK<\/a>\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MySQL\u6578\u64da\u5eab\u4e2d\u8655\u7406PRIMARY KEY\u91cd\u8907\u7684\u4e09\u7a2e\u65b9\u6848\uff0c\u63d0\u5347\u6578\u64da\u5b8c\u6574\u6027\u8207\u6027\u80fd\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-76700","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76700","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=76700"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76700\/revisions"}],"predecessor-version":[{"id":76701,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76700\/revisions\/76701"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}