{"id":191406,"date":"2024-11-12T16:39:25","date_gmt":"2024-11-12T08:39:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/191406\/"},"modified":"2024-11-12T16:39:27","modified_gmt":"2024-11-12T08:39:27","slug":"%e8%a9%b3%e8%a7%a3mysql%e4%b8%ad%e7%84%a1%e9%87%8d%e8%a4%87%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e8%aa%9e%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/191406\/","title":{"rendered":"\u8a73\u89e3MYSQL\u4e2d\u7121\u91cd\u8907\u63d2\u5165\u6578\u64da\u66f4\u65b0\u8a9e\u6cd5"},"content":{"rendered":"

\u8a73\u89e3MYSQL\u4e2d\u7121\u91cd\u8907\u63d2\u5165\u6578\u64da\u66f4\u65b0\u8a9e\u6cd5<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u7576\u6211\u5011\u9700\u8981\u63d2\u5165\u6578\u64da\u6642\uff0c\u7d93\u5e38\u6703\u9047\u5230\u91cd\u8907\u6578\u64da\u7684\u554f\u984c\u3002\u70ba\u4e86\u907f\u514d\u9019\u7a2e\u60c5\u6cc1\uff0cMySQL\u63d0\u4f9b\u4e86\u5e7e\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u7121\u91cd\u8907\u63d2\u5165\u6578\u64da\u7684\u66f4\u65b0\u8a9e\u6cd5\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u9019\u4e9b\u65b9\u6cd5\u53ca\u5176\u4f7f\u7528\u60c5\u5883\u3002<\/p>\n

1. \u4f7f\u7528INSERT … ON DUPLICATE KEY UPDATE<\/h2>\n

\u6700\u5e38\u898b\u7684\u7121\u91cd\u8907\u63d2\u5165\u6578\u64da\u7684\u65b9\u5f0f\u662f\u4f7f\u7528 INSERT ... ON DUPLICATE KEY UPDATE<\/code> \u8a9e\u6cd5\u3002\u9019\u7a2e\u65b9\u6cd5\u5141\u8a31\u5728\u63d2\u5165\u6578\u64da\u6642\uff0c\u5982\u679c\u9047\u5230\u4e3b\u9375\u6216\u552f\u4e00\u7d22\u5f15\u7684\u91cd\u8907\uff0c\u5247\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u3002<\/p>\n

INSERT INTO \u8868\u540d (\u6b04\u4f4d1, \u6b04\u4f4d2) \nVALUES (\u503c1, \u503c2) \nON DUPLICATE KEY UPDATE \n\u6b04\u4f4d2 = \u503c2;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7528\u6236\u8868\uff0c\u5305\u542b\u7528\u6236ID\u548c\u7528\u6236\u540d\uff1a<\/p>\n
CREATE TABLE users (\n    user_id INT PRIMARY KEY,\n    username VARCHAR(50) UNIQUE\n);<\/code><\/pre>\n
\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\u4f86\u63d2\u5165\u6216\u66f4\u65b0\u7528\u6236\u6578\u64da\uff1a<\/p>\n
INSERT INTO users (user_id, username) \nVALUES (1, 'Alice') \nON DUPLICATE KEY UPDATE \nusername = 'Alice';<\/code><\/pre>\n
\u5982\u679c\u7528\u6236ID\u70ba1\u7684\u8a18\u9304\u5df2\u5b58\u5728\uff0c\u5247\u6703\u66f4\u65b0\u7528\u6236\u540d\uff1b\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5247\u6703\u63d2\u5165\u65b0\u8a18\u9304\u3002<\/p>\n
2. \u4f7f\u7528REPLACE INTO<\/h2>\n
\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u4f7f\u7528 REPLACE INTO<\/code> \u8a9e\u6cd5\u3002\u9019\u500b\u8a9e\u6cd5\u6703\u5148\u522a\u9664\u8207\u63d2\u5165\u6578\u64da\u76f8\u540c\u4e3b\u9375\u7684\u820a\u8a18\u9304\uff0c\u7136\u5f8c\u63d2\u5165\u65b0\u8a18\u9304\u3002<\/p>\n
REPLACE INTO \u8868\u540d (\u6b04\u4f4d1, \u6b04\u4f4d2) \nVALUES (\u503c1, \u503c2);<\/code><\/pre>\n
\u4f8b\u5982\uff1a<\/p>\n
REPLACE INTO users (user_id, username) \nVALUES (1, 'Bob');<\/code><\/pre>\n
\u5982\u679c\u7528\u6236ID\u70ba1\u7684\u8a18\u9304\u5df2\u5b58\u5728\uff0c\u5247\u6703\u88ab\u522a\u9664\u4e26\u63d2\u5165\u65b0\u8a18\u9304\uff1b\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5247\u76f4\u63a5\u63d2\u5165\u65b0\u8a18\u9304\u3002<\/p>\n
3. \u4f7f\u7528INSERT IGNORE<\/h2>\n
\u5982\u679c\u6211\u5011\u5e0c\u671b\u5728\u63d2\u5165\u6642\u5ffd\u7565\u91cd\u8907\u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528 INSERT IGNORE<\/code> \u8a9e\u6cd5\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u9047\u5230\u91cd\u8907\u7684\u4e3b\u9375\u6216\u552f\u4e00\u7d22\u5f15\u6642\uff0c\u4e0d\u6703\u5831\u932f\uff0c\u800c\u662f\u7c21\u55ae\u5730\u5ffd\u7565\u8a72\u63d2\u5165\u64cd\u4f5c\u3002<\/p>\n
INSERT IGNORE INTO \u8868\u540d (\u6b04\u4f4d1, \u6b04\u4f4d2) \nVALUES (\u503c1, \u503c2);<\/code><\/pre>\n
\u4f8b\u5982\uff1a<\/p>\n
INSERT IGNORE INTO users (user_id, username) \nVALUES (1, 'Charlie');<\/code><\/pre>\n
\u5982\u679c\u7528\u6236ID\u70ba1\u7684\u8a18\u9304\u5df2\u5b58\u5728\uff0c\u5247\u4e0d\u6703\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\uff1b\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5247\u6703\u63d2\u5165\u65b0\u8a18\u9304\u3002<\/p>\n
4. \u5c0f\u7d50<\/h2>\n
\u5728MySQL\u4e2d\uff0c\u7121\u91cd\u8907\u63d2\u5165\u6578\u64da\u7684\u66f4\u65b0\u8a9e\u6cd5\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f7f\u7528 INSERT ... ON DUPLICATE KEY UPDATE<\/code>\u3001REPLACE INTO<\/code> \u9084\u662f INSERT IGNORE<\/code>\uff0c\u90fd\u80fd\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u7684\u63d2\u5165\u548c\u66f4\u65b0\u3002<\/p>\n
\u9019\u4e9b\u8a9e\u6cd5\u7684\u9748\u6d3b\u6027\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u6839\u64da\u696d\u52d9\u9700\u6c42\u9032\u884c\u6578\u64da\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6548\u7387\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684\u63d2\u5165\u548c\u66f4\u65b0\u8a9e\u6cd5\u5c0d\u65bc\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f7f\u7528 INSERT ... ON DUPLICATE KEY UPDATE<\/code>\u3001REPLACE INTO<\/code> \u9084\u662f INSERT IGNORE<\/code>\uff0c\u90fd\u80fd\u6709\u6548\u5730\u89e3\u6c7a\u91cd\u8907\u6578\u64da\u7684\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u4e00\u500b\u91cd\u8981\u8003\u91cf\uff0c\u7279\u5225\u662f\u5728\u9999\u6e2f\u7684\u6578\u64da\u4e2d\u5fc3\u4e2d\uff0c\u80fd\u5920\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u548c\u5feb\u901f\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3MySQL\u4e2d\u7121\u91cd\u8907\u63d2\u5165\u6578\u64da\u7684\u66f4\u65b0\u8a9e\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7ba1\u7406\u6578\u64da\uff0c\u907f\u514d\u91cd\u8907\u8a18\u9304\uff0c\u63d0\u9ad8\u6578\u64da\u5eab\u6548\u7387\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-191406","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191406","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=191406"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191406\/revisions"}],"predecessor-version":[{"id":191407,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191406\/revisions\/191407"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=191406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=191406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=191406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}