{"id":76088,"date":"2024-10-16T03:45:18","date_gmt":"2024-10-15T19:45:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76088\/"},"modified":"2024-10-16T03:45:18","modified_gmt":"2024-10-15T19:45:18","slug":"mysql%e5%88%97%e9%a1%9e%e5%9e%8b%e9%81%b8%e6%93%87%e5%92%8c%e6%9f%a5%e8%a9%a2%e6%95%88%e7%8e%87%e7%9a%84%e8%81%af%e7%b9%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76088\/","title":{"rendered":"MySQL\u5217\u985e\u578b\u9078\u64c7\u548c\u67e5\u8a62\u6548\u7387\u7684\u806f\u7e6b"},"content":{"rendered":"<h1 id=\"mysql%e5%88%97%e9%a1%9e%e5%9e%8b%e9%81%b8%e6%93%87%e5%92%8c%e6%9f%a5%e8%a9%a2%e6%95%88%e7%8e%87%e7%9a%84%e8%81%af%e7%b9%ab-fvncwcuUzd\">MySQL\u5217\u985e\u578b\u9078\u64c7\u548c\u67e5\u8a62\u6548\u7387\u7684\u806f\u7e6b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684\u5217\u985e\u578b\u5c0d\u65bc\u67e5\u8a62\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\u4f9b\u958b\u767c\u8005\u9078\u64c7\u3002\u672c\u6587\u5c07\u63a2\u8a0eMySQL\u4e2d\u4e0d\u540c\u5217\u985e\u578b\u7684\u7279\u6027\uff0c\u4ee5\u53ca\u5b83\u5011\u5982\u4f55\u5f71\u97ff\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"mysql%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-fvncwcuUzd\">MySQL\u4e2d\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>MySQL\u652f\u6301\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u4e3b\u8981\u5206\u70ba\u4ee5\u4e0b\u5e7e\u985e\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u503c\u985e\u578b\uff1a<\/strong>\u5305\u62ec\u6574\u6578\u985e\u578b\uff08\u5982 TINYINT\u3001SMALLINT\u3001MEDIUMINT\u3001INT\u3001BIGINT\uff09\u548c\u6d6e\u9ede\u6578\u985e\u578b\uff08\u5982 FLOAT\u3001DOUBLE\u3001DECIMAL\uff09\u3002<\/li>\n<li><strong>\u5b57\u7b26\u4e32\u985e\u578b\uff1a<\/strong>\u5305\u62ec CHAR\u3001VARCHAR\u3001TEXT\u3001BLOB \u7b49\u3002\u9019\u4e9b\u985e\u578b\u9069\u5408\u5b58\u5132\u5b57\u7b26\u6216\u4e8c\u9032\u5236\u6578\u64da\u3002<\/li>\n<li><strong>\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\uff1a<\/strong>\u5305\u62ec DATE\u3001TIME\u3001DATETIME\u3001TIMESTAMP \u548c YEAR\uff0c\u9069\u5408\u5b58\u5132\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%88%97%e9%a1%9e%e5%9e%8b%e7%9a%84%e9%81%b8%e6%93%87-fvncwcuUzd\">\u5217\u985e\u578b\u7684\u9078\u64c7<\/h2>\n<p>\u9078\u64c7\u5408\u9069\u7684\u5217\u985e\u578b\u4e0d\u50c5\u5f71\u97ff\u6578\u64da\u7684\u5b58\u5132\u65b9\u5f0f\uff0c\u9084\u6703\u5f71\u97ff\u67e5\u8a62\u7684\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u9078\u64c7\u5217\u985e\u578b\u6642\u9700\u8981\u8003\u616e\u7684\u56e0\u7d20\uff1a<\/p>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e7%af%84%e5%9c%8d-fvncwcuUzd\">1. \u6578\u64da\u7bc4\u570d<\/h3>\n<p>\u5728\u9078\u64c7\u6574\u6578\u985e\u578b\u6642\uff0c\u61c9\u6839\u64da\u6578\u64da\u7684\u7bc4\u570d\u9078\u64c7\u5408\u9069\u7684\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5982\u679c\u53ea\u9700\u5b58\u51320\u5230255\u4e4b\u9593\u7684\u6578\u5b57\uff0c\u5247\u4f7f\u7528TINYINT\u6703\u6bd4\u4f7f\u7528INT\u66f4\u6709\u6548\uff0c\u56e0\u70ba\u5b83\u4f54\u7528\u7684\u5b58\u5132\u7a7a\u9593\u66f4\u5c0f\u3002<\/p>\n<h3 id=\"2-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6-fvncwcuUzd\">2. \u5b57\u7b26\u4e32\u9577\u5ea6<\/h3>\n<p>\u5c0d\u65bc\u5b57\u7b26\u4e32\u985e\u578b\uff0cVARCHAR\u901a\u5e38\u6bd4CHAR\u66f4\u6709\u6548\uff0c\u56e0\u70baVARCHAR\u6839\u64da\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u4f54\u7528\u7a7a\u9593\uff0c\u800cCHAR\u5247\u59cb\u7d42\u4f54\u7528\u56fa\u5b9a\u7684\u7a7a\u9593\u3002\u9019\u5728\u8655\u7406\u8b8a\u9577\u5b57\u7b26\u4e32\u6642\u7279\u5225\u91cd\u8981\u3002<\/p>\n<h3 id=\"3-%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-fvncwcuUzd\">3. \u67e5\u8a62\u6027\u80fd<\/h3>\n<p>\u67e5\u8a62\u6027\u80fd\u8207\u5217\u985e\u578b\u5bc6\u5207\u76f8\u95dc\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\uff0c\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\uff08\u5982B-Tree\u6216Hash\u7d22\u5f15\uff09\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u4f7f\u7528\u6574\u6578\u985e\u578b\u4f5c\u70ba\u7d22\u5f15\u901a\u5e38\u6bd4\u5b57\u7b26\u4e32\u985e\u578b\u66f4\u5feb\uff0c\u56e0\u70ba\u6574\u6578\u6bd4\u8f03\u7684\u901f\u5ea6\u66f4\u5feb\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e6%95%88%e7%8e%87%e7%9a%84%e5%bd%b1%e9%9f%bf%e5%9b%a0%e7%b4%a0-fvncwcuUzd\">\u67e5\u8a62\u6548\u7387\u7684\u5f71\u97ff\u56e0\u7d20<\/h2>\n<p>\u9664\u4e86\u5217\u985e\u578b\u5916\uff0c\u9084\u6709\u5176\u4ed6\u56e0\u7d20\u6703\u5f71\u97ff\u67e5\u8a62\u6548\u7387\uff1a<\/p>\n<ul>\n<li><strong>\u7d22\u5f15\uff1a<\/strong>\u9069\u7576\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u5c0d\u65bc\u7d93\u5e38\u67e5\u8a62\u7684\u5217\uff0c\u61c9\u8003\u616e\u5efa\u7acb\u7d22\u5f15\u3002<\/li>\n<li><strong>\u67e5\u8a62\u8a9e\u53e5\u7684\u512a\u5316\uff1a<\/strong>\u4f7f\u7528EXPLAIN\u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u9032\u884c\u512a\u5316\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u8a2d\u8a08\uff1a<\/strong>\u826f\u597d\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u53ef\u4ee5\u6e1b\u5c11\u5197\u9918\u6578\u64da\uff0c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e4%be%8b%e5%88%86%e6%9e%90-fvncwcuUzd\">\u5be6\u4f8b\u5206\u6790<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7528\u65bc\u5b58\u5132\u7528\u6236\u4fe1\u606f\u7684\u8868\u683c\uff0c\u5305\u542b\u7528\u6236ID\u3001\u7528\u6236\u540d\u548c\u8a3b\u518a\u65e5\u671f\u3002\u4ee5\u4e0b\u662f\u8868\u683c\u7684\u5275\u5efa\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    user_id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL,\n    registration_date DATETIME NOT NULL\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cuser_id\u4f7f\u7528INT\u985e\u578b\uff0c\u56e0\u70ba\u5b83\u662f\u81ea\u589e\u7684\u6574\u6578\uff0c\u9069\u5408\u7528\u4f5c\u4e3b\u9375\u3002username\u4f7f\u7528VARCHAR(50)\uff0c\u56e0\u70ba\u7528\u6236\u540d\u7684\u9577\u5ea6\u4e0d\u56fa\u5b9a\u3002registration_date\u4f7f\u7528DATETIME\uff0c\u56e0\u70ba\u6211\u5011\u9700\u8981\u5b58\u5132\u5177\u9ad4\u7684\u8a3b\u518a\u6642\u9593\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-fvncwcuUzd\">\u7e3d\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5217\u985e\u578b\u7684\u9078\u64c7\u5c0d\u67e5\u8a62\u6548\u7387\u6709\u8457\u6df1\u9060\u7684\u5f71\u97ff\u3002\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4e0d\u50c5\u80fd\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\uff0c\u9084\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u958b\u767c\u8005\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\uff0c\u4ed4\u7d30\u8003\u616e\u6578\u64da\u7bc4\u570d\u3001\u5b57\u7b26\u4e32\u9577\u5ea6\u53ca\u7d22\u5f15\u7684\u4f7f\u7528\uff0c\u4ee5\u9054\u5230\u6700\u4f73\u7684\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<em><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/em>\u548c<em><a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a><\/em>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u8a0eMySQL\u5217\u985e\u578b\u9078\u64c7\u5982\u4f55\u5f71\u97ff\u67e5\u8a62\u6548\u7387\uff0c\u5e6b\u52a9\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u548c\u63d0\u5347\u67e5\u8a62\u901f\u5ea6\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-76088","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76088","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=76088"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76088\/revisions"}],"predecessor-version":[{"id":76089,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76088\/revisions\/76089"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}