{"id":76784,"date":"2024-10-16T09:54:21","date_gmt":"2024-10-16T01:54:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76784\/"},"modified":"2024-10-16T09:54:21","modified_gmt":"2024-10-16T01:54:21","slug":"mysql%e7%b4%a2%e5%bc%95%e9%a1%9e%e5%9e%8b%e5%a4%a7%e5%8c%af%e7%b8%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76784\/","title":{"rendered":"MySQL\u7d22\u5f15\u985e\u578b\u5927\u532f\u7e3d"},"content":{"rendered":"

MySQL\u7d22\u5f15\u985e\u578b\u5927\u532f\u7e3d<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u6bcf\u7a2e\u7d22\u5f15\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7528\u9014\u548c\u512a\u7f3a\u9ede\u3002\u672c\u6587\u5c07\u5c0dMySQL\u7684\u4e3b\u8981\u7d22\u5f15\u985e\u578b\u9032\u884c\u8a73\u7d30\u4ecb\u7d39\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u9019\u4e9b\u7d22\u5f15\u3002<\/p>\n

1. \u4e3b\u9375\u7d22\u5f15\uff08Primary Key Index\uff09<\/h2>\n

\u4e3b\u9375\u7d22\u5f15\u662f\u552f\u4e00\u7684\uff0c\u4e26\u4e14\u4e0d\u5141\u8a31\u6709\u7a7a\u503c\u3002\u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b\u4e3b\u9375\u7d22\u5f15\uff0c\u901a\u5e38\u7528\u65bc\u552f\u4e00\u6a19\u8b58\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u6578\u64da\u3002\u4e3b\u9375\u7d22\u5f15\u7684\u5be6\u73fe\u901a\u5e38\u662f\u57fa\u65bcB\u6a39\u7d50\u69cb\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u901f\u5ea6\u975e\u5e38\u5feb\u3002<\/p>\n

CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL\n);<\/code><\/pre>\n
2. \u552f\u4e00\u7d22\u5f15\uff08Unique Index\uff09<\/h2>\n
\u552f\u4e00\u7d22\u5f15\u8207\u4e3b\u9375\u7d22\u5f15\u985e\u4f3c\uff0c\u4f46\u5141\u8a31\u6709\u7a7a\u503c\u3002\u5b83\u78ba\u4fdd\u7d22\u5f15\u5217\u4e2d\u7684\u6240\u6709\u503c\u90fd\u662f\u552f\u4e00\u7684\u3002\u9019\u5c0d\u65bc\u9700\u8981\u4fdd\u6301\u6578\u64da\u552f\u4e00\u6027\u7684\u5217\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u7528\u6236\u540d\u6216\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n
CREATE TABLE products (\n    product_id INT AUTO_INCREMENT PRIMARY KEY,\n    product_name VARCHAR(100) NOT NULL UNIQUE\n);<\/code><\/pre>\n
3. \u666e\u901a\u7d22\u5f15\uff08Regular Index\uff09<\/h2>\n
\u666e\u901a\u7d22\u5f15\u662f\u6700\u57fa\u672c\u7684\u7d22\u5f15\u985e\u578b\uff0c\u6c92\u6709\u552f\u4e00\u6027\u9650\u5236\u3002\u5b83\u53ef\u4ee5\u52a0\u901f\u67e5\u8a62\uff0c\u4f46\u4e0d\u6703\u5f37\u5236\u6578\u64da\u7684\u552f\u4e00\u6027\u3002\u666e\u901a\u7d22\u5f15\u9069\u5408\u65bc\u67e5\u8a62\u983b\u7e41\u7684\u5217\u3002<\/p>\n
CREATE INDEX idx_username ON users (username);<\/code><\/pre>\n
4. \u5168\u6587\u7d22\u5f15\uff08Full-Text Index\uff09<\/h2>\n
\u5168\u6587\u7d22\u5f15\u7528\u65bc\u5c0d\u6587\u672c\u6578\u64da\u9032\u884c\u9ad8\u6548\u7684\u641c\u7d22\u3002\u5b83\u7279\u5225\u9069\u5408\u65bc\u9700\u8981\u9032\u884c\u95dc\u9375\u5b57\u641c\u7d22\u7684\u5834\u666f\uff0c\u5982\u6587\u7ae0\u5167\u5bb9\u6216\u7522\u54c1\u63cf\u8ff0\u3002MySQL\u652f\u6301\u5c0dCHAR\u3001VARCHAR\u548cTEXT\u985e\u578b\u7684\u5217\u9032\u884c\u5168\u6587\u7d22\u5f15\u3002<\/p>\n
CREATE FULLTEXT INDEX idx_content ON articles (content);<\/code><\/pre>\n
5. \u7a7a\u9593\u7d22\u5f15\uff08Spatial Index\uff09<\/h2>\n
\u7a7a\u9593\u7d22\u5f15\u4e3b\u8981\u7528\u65bc\u5730\u7406\u6578\u64da\u985e\u578b\uff0c\u652f\u6301\u7a7a\u9593\u67e5\u8a62\u3002\u9019\u985e\u7d22\u5f15\u901a\u5e38\u7528\u65bc\u5730\u7406\u4fe1\u606f\u7cfb\u7d71\uff08GIS\uff09\u4e2d\uff0c\u80fd\u5920\u9ad8\u6548\u5730\u8655\u7406\u5730\u7406\u4f4d\u7f6e\u7684\u67e5\u8a62\u3002<\/p>\n
CREATE SPATIAL INDEX idx_location ON locations (coordinates);<\/code><\/pre>\n
6. \u590d\u5408\u7d22\u5f15\uff08Composite Index\uff09<\/h2>\n
\u590d\u5408\u7d22\u5f15\u662f\u7531\u591a\u500b\u5217\u7d44\u6210\u7684\u7d22\u5f15\u3002\u5b83\u53ef\u4ee5\u63d0\u9ad8\u591a\u5217\u67e5\u8a62\u7684\u6027\u80fd\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u9700\u8981\u6ce8\u610f\u7d22\u5f15\u7684\u9806\u5e8f\uff0c\u56e0\u70ba\u67e5\u8a62\u7684\u6548\u7387\u8207\u7d22\u5f15\u7684\u5217\u9806\u5e8f\u5bc6\u5207\u76f8\u95dc\u3002<\/p>\n
CREATE INDEX idx_user_email ON users (username, email);<\/code><\/pre>\n
7. \u8986\u84cb\u7d22\u5f15\uff08Covering Index\uff09<\/h2>\n
\u8986\u84cb\u7d22\u5f15\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u7d22\u5f15\uff0c\u80fd\u5920\u5305\u542b\u67e5\u8a62\u6240\u9700\u7684\u6240\u6709\u5217\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u56de\u8868\u64cd\u4f5c\u3002\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n
SELECT username FROM users WHERE email = 'example@example.com';<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u6bcf\u7a2e\u7d22\u5f15\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7528\u9014\u548c\u512a\u7f3a\u9ede\u3002\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u67e5\u8a62\u6027\u80fd\u3002\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u5408\u7406\u4f7f\u7528\u7d22\u5f15\uff0c\u4ee5\u9054\u5230\u6700\u4f73\u7684\u6027\u80fd\u6548\u679c\u3002\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u63a2\u8a0eMySQL\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ecB\u6a39\u3001\u54c8\u5e0c\u3001\u5168\u6587\u7d22\u5f15\u7b49\uff0c\u5e6b\u52a9\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u8207\u67e5\u8a62\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-76784","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76784","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=76784"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76784\/revisions"}],"predecessor-version":[{"id":76785,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76784\/revisions\/76785"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76784"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76784"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}