{"id":76708,"date":"2024-10-16T09:10:16","date_gmt":"2024-10-16T01:10:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76708\/"},"modified":"2024-10-16T09:10:16","modified_gmt":"2024-10-16T01:10:16","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%b8%b8%e7%94%a8%e7%9a%84%e6%87%89%e7%94%a8%e6%8a%80%e5%b7%a7%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76708\/","title":{"rendered":"MySQL\u6578\u64da\u5eab\u4e2d\u5e38\u7528\u7684\u61c9\u7528\u6280\u5de7\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

MySQL\u6578\u64da\u5eab\u4e2d\u5e38\u7528\u7684\u61c9\u7528\u6280\u5de7\u6709\u54ea\u4e9b\uff1f<\/h1>\n

MySQL\u662f\u4e00\u7a2e\u6d41\u884c\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u7db2\u7ad9\u548c\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u4f01\u696d\u7d1a\u61c9\u7528\uff0cMySQL\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u9748\u6d3b\u7684\u6578\u64da\u7ba1\u7406\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u5728MySQL\u6578\u64da\u5eab\u4e2d\u5e38\u7528\u7684\u61c9\u7528\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u4f7f\u7528\u9019\u4e00\u5f37\u5927\u7684\u5de5\u5177\u3002<\/p>\n

1. \u4f7f\u7528\u7d22\u5f15\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd<\/h2>\n

\u7d22\u5f15\u662f\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u901f\u5ea6\u7684\u95dc\u9375\u3002\u901a\u904e\u5728\u8868\u7684\u67d0\u4e9b\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6240\u9700\u7684\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u7d22\u5f15\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n

CREATE INDEX index_name ON table_name (column_name);<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u6709\u4e00\u500b\u7528\u6236\u8868\uff0c\u4e26\u4e14\u7d93\u5e38\u6839\u64da\u7528\u6236\u540d\u67e5\u8a62\uff0c\u53ef\u4ee5\u9019\u6a23\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n
CREATE INDEX idx_username ON users (username);<\/code><\/pre>\n
2. \u4f7f\u7528JOIN\u512a\u5316\u6578\u64da\u67e5\u8a62<\/h2>\n
\u5728MySQL\u4e2d\uff0cJOIN\u64cd\u4f5c\u53ef\u4ee5\u5c07\u591a\u500b\u8868\u4e2d\u7684\u6578\u64da\u7d50\u5408\u5728\u4e00\u8d77\uff0c\u5f9e\u800c\u907f\u514d\u91cd\u8907\u6578\u64da\u4e26\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u5e38\u898b\u7684JOIN\u985e\u578b\u5305\u62ecINNER JOIN\u3001LEFT JOIN\u548cRIGHT JOIN\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528INNER JOIN\u7684\u793a\u4f8b\uff1a<\/p>\n
SELECT users.username, orders.order_date \nFROM users \nINNER JOIN orders ON users.id = orders.user_id;<\/code><\/pre>\n
\u9019\u6a23\u7684\u67e5\u8a62\u53ef\u4ee5\u540c\u6642\u7372\u53d6\u7528\u6236\u540d\u548c\u8a02\u55ae\u65e5\u671f\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u8b80\u6027\u548c\u67e5\u8a62\u6548\u7387\u3002<\/p>\n
3. \u4f7f\u7528\u4e8b\u52d9\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027<\/h2>\n
\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u591a\u500b\u76f8\u95dc\u64cd\u4f5c\u6642\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u4e8b\u52d9\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n
START TRANSACTION; \n-- SQL\u64cd\u4f5c \nCOMMIT; -- \u6216 ROLLBACK;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5728\u8655\u7406\u7528\u6236\u8a3b\u518a\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u7528\u6236\u4fe1\u606f\u548c\u76f8\u95dc\u6578\u64da\u7684\u5b8c\u6574\u6027\uff1a<\/p>\n
START TRANSACTION; \nINSERT INTO users (username, password) VALUES ('user1', 'pass1'); \nINSERT INTO profiles (user_id, bio) VALUES (LAST_INSERT_ID(), 'Hello World!'); \nCOMMIT;<\/code><\/pre>\n
4. \u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u63d0\u9ad8\u91cd\u7528\u6027<\/h2>\n
\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u7d44\u9810\u7de8\u8b6f\u7684SQL\u8a9e\u53e5\uff0c\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u4e26\u91cd\u8907\u4f7f\u7528\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6027\u80fd\uff0c\u9084\u80fd\u7c21\u5316\u4ee3\u78bc\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u5b58\u5132\u904e\u7a0b\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n
CREATE PROCEDURE procedure_name (IN param1 INT) \nBEGIN \n    -- SQL\u64cd\u4f5c \nEND;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5275\u5efa\u4e00\u500b\u7528\u65bc\u7372\u53d6\u7528\u6236\u4fe1\u606f\u7684\u5b58\u5132\u904e\u7a0b\uff1a<\/p>\n
CREATE PROCEDURE GetUserInfo (IN userId INT) \nBEGIN \n    SELECT * FROM users WHERE id = userId; \nEND;<\/code><\/pre>\n
5. \u5b9a\u671f\u5099\u4efd\u6578\u64da<\/h2>\n
\u6578\u64da\u5099\u4efd\u662f\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u7684\u91cd\u8981\u63aa\u65bd\u3002MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u5099\u4efd\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528mysqldump\u5de5\u5177\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528mysqldump\u9032\u884c\u5099\u4efd\u7684\u57fa\u672c\u547d\u4ee4\uff1a<\/p>\n
mysqldump -u username -p database_name > backup.sql<\/code><\/pre>\n
\u5b9a\u671f\u5099\u4efd\u6578\u64da\u53ef\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\uff0c\u4e26\u78ba\u4fdd\u5728\u767c\u751f\u6545\u969c\u6642\u80fd\u5920\u5feb\u901f\u6062\u5fa9\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u638c\u63e1MySQL\u7684\u61c9\u7528\u6280\u5de7\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528\u7d22\u5f15\u3001JOIN\u3001\u4e8b\u52d9\u3001\u5b58\u5132\u904e\u7a0b\u4ee5\u53ca\u5b9a\u671f\u5099\u4efd\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002\u9019\u4e9b\u6280\u5de7\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\uff0c\u9084\u80fd\u63d0\u5347\u6574\u9ad4\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u548c\u7528\u6236\u9ad4\u9a57\u3002\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\u90e8\u7f72\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u66f4\u5feb\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u66f4\u9ad8\u7684\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MySQL\u6578\u64da\u5eab\u4e2d\u7684\u5e38\u7528\u61c9\u7528\u6280\u5de7\uff0c\u5305\u62ec\u67e5\u8a62\u512a\u5316\u3001\u7d22\u5f15\u4f7f\u7528\u3001\u6578\u64da\u5099\u4efd\u548c\u6062\u5fa9\u7b49\uff0c\u63d0\u9ad8\u6578\u64da\u7ba1\u7406\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-76708","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76708","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=76708"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76708\/revisions"}],"predecessor-version":[{"id":76709,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76708\/revisions\/76709"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}