{"id":61029,"date":"2024-10-13T07:50:15","date_gmt":"2024-10-12T23:50:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61029\/"},"modified":"2024-10-13T07:50:15","modified_gmt":"2024-10-12T23:50:15","slug":"dba%e5%bf%85%e5%82%99%ef%bc%9amysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c%e5%92%8c%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61029\/","title":{"rendered":"DBA\u5fc5\u5099\uff1aMySQL\u6578\u64da\u5eab\u5e38\u7528\u64cd\u4f5c\u548c\u6280\u5de7"},"content":{"rendered":"<h1 id=\"dba%e5%bf%85%e5%82%99%ef%bc%9amysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c%e5%92%8c%e6%8a%80%e5%b7%a7-ueobdMJQGr\">DBA\u5fc5\u5099\uff1aMySQL\u6578\u64da\u5eab\u5e38\u7528\u64cd\u4f5c\u548c\u6280\u5de7<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002MySQL\u4f5c\u70ba\u6700\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u4e4b\u4e00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u54e1\uff08DBA\uff09\u4f86\u8aaa\uff0c\u638c\u63e1MySQL\u7684\u5e38\u7528\u64cd\u4f5c\u548c\u6280\u5de7\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u57fa\u672c\u64cd\u4f5c\u3001\u6700\u4f73\u5be6\u8e10\u4ee5\u53ca\u4e00\u4e9b\u9032\u968e\u6280\u5de7\uff0c\u5e6b\u52a9DBA\u66f4\u6709\u6548\u5730\u7ba1\u7406MySQL\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%93%8d%e4%bd%9c-ueobdMJQGr\">\u57fa\u672c\u64cd\u4f5c<\/h2>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab-ueobdMJQGr\">1. \u5275\u5efa\u6578\u64da\u5eab<\/h3>\n<p>\u5275\u5efa\u6578\u64da\u5eab\u662fMySQL\u7684\u57fa\u672c\u64cd\u4f5c\u4e4b\u4e00\u3002\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u53ef\u4ee5\u8f15\u9b06\u5275\u5efa\u4e00\u500b\u65b0\u7684\u6578\u64da\u5eab\uff1a<\/p>\n<pre><code>CREATE DATABASE my_database;<\/code><\/pre>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e8%a1%a8-ueobdMJQGr\">2. \u5275\u5efa\u8868<\/h3>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\u5275\u5efa\u8868\u662f\u5b58\u5132\u6578\u64da\u7684\u95dc\u9375\u6b65\u9a5f\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u8868\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>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<h3 id=\"3-%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-ueobdMJQGr\">3. \u63d2\u5165\u6578\u64da<\/h3>\n<p>\u63d2\u5165\u6578\u64da\u662f\u5c07\u4fe1\u606f\u6dfb\u52a0\u5230\u8868\u4e2d\u7684\u904e\u7a0b\u3002\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u53ef\u4ee5\u63d2\u5165\u6578\u64da\uff1a<\/p>\n<pre><code>INSERT INTO users (username, email) VALUES ('john_doe', 'john@example.com');<\/code><\/pre>\n<h3 id=\"4-%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-ueobdMJQGr\">4. \u67e5\u8a62\u6578\u64da<\/h3>\n<p>\u67e5\u8a62\u6578\u64da\u662fDBA\u65e5\u5e38\u5de5\u4f5c\u4e2d\u6700\u5e38\u898b\u7684\u64cd\u4f5c\u4e4b\u4e00\u3002\u4f7f\u7528SELECT\u8a9e\u53e5\u53ef\u4ee5\u6aa2\u7d22\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM users;<\/code><\/pre>\n<h3 id=\"5-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-ueobdMJQGr\">5. \u66f4\u65b0\u6578\u64da<\/h3>\n<p>\u66f4\u65b0\u6578\u64da\u53ef\u4ee5\u4f7f\u7528UPDATE\u8a9e\u53e5\uff0c\u4ee5\u4e0b\u662f\u66f4\u65b0\u7528\u6236\u96fb\u5b50\u90f5\u4ef6\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>UPDATE users SET email = 'john.doe@example.com' WHERE username = 'john_doe';<\/code><\/pre>\n<h3 id=\"6-%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-ueobdMJQGr\">6. \u522a\u9664\u6578\u64da<\/h3>\n<p>\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\u53ef\u4ee5\u4f7f\u7528DELETE\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE username = 'john_doe';<\/code><\/pre>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-ueobdMJQGr\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<h3 id=\"1-%e5%ae%9a%e6%9c%9f%e5%82%99%e4%bb%bd-ueobdMJQGr\">1. \u5b9a\u671f\u5099\u4efd<\/h3>\n<p>\u6578\u64da\u4e1f\u5931\u53ef\u80fd\u6703\u5c0d\u696d\u52d9\u9020\u6210\u91cd\u5927\u640d\u5931\uff0c\u56e0\u6b64\u5b9a\u671f\u5099\u4efd\u6578\u64da\u5eab\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528mysqldump\u5de5\u5177\u9032\u884c\u5099\u4efd\uff1a<\/p>\n<pre><code>mysqldump -u username -p my_database &gt; backup.sql<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-ueobdMJQGr\">2. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\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\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_username ON users (username);<\/code><\/pre>\n<h3 id=\"3-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2-ueobdMJQGr\">3. \u512a\u5316\u67e5\u8a62<\/h3>\n<p>\u4f7f\u7528EXPLAIN\u8a9e\u53e5\u53ef\u4ee5\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff1a<\/p>\n<pre><code>EXPLAIN SELECT * FROM users WHERE username = 'john_doe';<\/code><\/pre>\n<h2 id=\"%e9%80%b2%e9%9a%8e%e6%8a%80%e5%b7%a7-ueobdMJQGr\">\u9032\u968e\u6280\u5de7<\/h2>\n<h3 id=\"1-%e8%a7%b8%e7%99%bc%e5%99%a8-ueobdMJQGr\">1. \u89f8\u767c\u5668<\/h3>\n<p>\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u53ef\u4ee5\u5728\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u89f8\u767c\u5668\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TRIGGER before_insert_users\nBEFORE INSERT ON users\nFOR EACH ROW\nSET NEW.created_at = NOW();<\/code><\/pre>\n<h3 id=\"2-%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-ueobdMJQGr\">2. \u5b58\u5132\u904e\u7a0b<\/h3>\n<p>\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u7d44\u9810\u7de8\u8b6f\u7684SQL\u8a9e\u53e5\uff0c\u53ef\u4ee5\u91cd\u8907\u57f7\u884c\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u5b58\u5132\u904e\u7a0b\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE PROCEDURE GetUserByUsername(IN username VARCHAR(50))\nBEGIN\n    SELECT * FROM users WHERE username = username;\nEND;<\/code><\/pre>\n<h3 id=\"3-%e4%ba%8b%e5%8b%99%e7%ae%a1%e7%90%86-ueobdMJQGr\">3. \u4e8b\u52d9\u7ba1\u7406<\/h3>\n<p>\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4f7f\u7528START TRANSACTION\u3001COMMIT\u548cROLLBACK\u4f86\u7ba1\u7406\u4e8b\u52d9\uff1a<\/p>\n<pre><code>START TRANSACTION;\nUPDATE users SET email = 'new_email@example.com' WHERE id = 1;\nCOMMIT;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ueobdMJQGr\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1MySQL\u7684\u57fa\u672c\u64cd\u4f5c\u548c\u6280\u5de7\u5c0d\u65bcDBA\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u5f9e\u5275\u5efa\u6578\u64da\u5eab\u5230\u9032\u968e\u7684\u4e8b\u52d9\u7ba1\u7406\uff0c\u9019\u4e9b\u6280\u80fd\u4e0d\u50c5\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u5b8c\u6574\u6027\u3002\u82e5\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1MySQL\u6578\u64da\u5eab\u7684\u5e38\u7528\u64cd\u4f5c\u548c\u6280\u5de7\uff0c\u63d0\u5347DBA\u6280\u80fd\uff0c\u512a\u5316\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-61029","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61029","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=61029"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61029\/revisions"}],"predecessor-version":[{"id":61030,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61029\/revisions\/61030"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}