{"id":154537,"date":"2024-11-02T16:38:23","date_gmt":"2024-11-02T08:38:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154537\/"},"modified":"2024-11-02T16:38:23","modified_gmt":"2024-11-02T08:38:23","slug":"%e5%b0%8d-mysql-%e4%bd%bf%e7%94%a8%e6%8a%80%e5%b7%a7%e7%9a%84%e6%8f%8f%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154537\/","title":{"rendered":"\u5c0d MySQL \u4f7f\u7528\u6280\u5de7\u7684\u63cf\u8ff0"},"content":{"rendered":"<h1 id=\"%e5%b0%8d-mysql-%e4%bd%bf%e7%94%a8%e6%8a%80%e5%b7%a7%e7%9a%84%e6%8f%8f%e8%bf%b0-QxVUUldJDQ\">\u5c0d MySQL \u4f7f\u7528\u6280\u5de7\u7684\u63cf\u8ff0<\/h1>\n<p>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\u548c\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u5be6\u7528\u7684 MySQL \u4f7f\u7528\u6280\u5de7\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u512a\u5316\u5176\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e6%8f%90%e9%ab%98%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-QxVUUldJDQ\">1. \u4f7f\u7528\u7d22\u5f15\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd<\/h2>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u3002\u901a\u904e\u5728\u8868\u7684\u67d0\u4e9b\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u7d22\u5f15\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>CREATE INDEX index_name ON table_name (column_name);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u6709\u4e00\u500b\u7528\u6236\u8868\uff0c\u4e26\u4e14\u7d93\u5e38\u6839\u64da\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u67e5\u8a62\u7528\u6236\uff0c\u53ef\u4ee5\u9019\u6a23\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_email ON users (email);<\/code><\/pre>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8-join-%e9%80%b2%e8%a1%8c%e5%a4%9a%e8%a1%a8%e6%9f%a5%e8%a9%a2-QxVUUldJDQ\">2. \u4f7f\u7528 JOIN \u9032\u884c\u591a\u8868\u67e5\u8a62<\/h2>\n<p>\u5728 MySQL \u4e2d\uff0cJOIN \u64cd\u4f5c\u5141\u8a31\u7528\u6236\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u9019\u5c0d\u65bc\u9700\u8981\u95dc\u806f\u4e0d\u540c\u6578\u64da\u96c6\u7684\u60c5\u6cc1\u7279\u5225\u6709\u7528\u3002\u4ee5\u4e0b\u662f INNER JOIN \u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>SELECT columns FROM table1\nINNER JOIN table2 ON table1.common_column = table2.common_column;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u8a02\u55ae\u8868\u548c\u4e00\u500b\u7528\u6236\u8868\uff0c\u4f60\u53ef\u4ee5\u9019\u6a23\u67e5\u8a62\u7528\u6236\u53ca\u5176\u8a02\u55ae\uff1a<\/p>\n<pre><code>SELECT users.name, orders.amount\nFROM users\nINNER JOIN orders ON users.id = orders.user_id;<\/code><\/pre>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99%e7%a2%ba%e4%bf%9d%e6%95%b8%e6%93%9a%e4%b8%80%e8%87%b4%e6%80%a7-QxVUUldJDQ\">3. \u4f7f\u7528\u4e8b\u52d9\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027<\/h2>\n<p>\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\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u4e8b\u52d9\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>START TRANSACTION;\n-- \u57f7\u884c\u591a\u500b SQL \u64cd\u4f5c\nCOMMIT; -- \u6216 ROLLBACK; \u4ee5\u64a4\u92b7\u64cd\u4f5c<\/code><\/pre>\n<p>\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\u6b63\u78ba\u6027\uff1a<\/p>\n<pre><code>START TRANSACTION;\nINSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com');\nINSERT INTO profiles (user_id, bio) VALUES (LAST_INSERT_ID(), 'Hello, I am John!');\nCOMMIT;<\/code><\/pre>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8%e9%a0%90%e8%99%95%e7%90%86%e8%aa%9e%e5%8f%a5%e6%8f%90%e9%ab%98%e5%ae%89%e5%85%a8%e6%80%a7%e5%92%8c%e6%80%a7%e8%83%bd-QxVUUldJDQ\">4. \u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u63d0\u9ad8\u5b89\u5168\u6027\u548c\u6027\u80fd<\/h2>\n<p>\u9810\u8655\u7406\u8a9e\u53e5\u4e0d\u50c5\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u9084\u80fd\u9632\u6b62 SQL \u6ce8\u5165\u653b\u64ca\u3002\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<pre><code>PREPARE stmt FROM 'SELECT * FROM users WHERE email = ?';\nSET @email = 'john@example.com';\nEXECUTE stmt USING @email;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u7528\u6236\u8f38\u5165\u7684\u6578\u64da\u4e0d\u6703\u76f4\u63a5\u5f71\u97ff SQL \u8a9e\u53e5\u7684\u7d50\u69cb\uff0c\u5f9e\u800c\u63d0\u9ad8\u5b89\u5168\u6027\u3002<\/p>\n<h2 id=\"5-%e5%ae%9a%e6%9c%9f%e5%82%99%e4%bb%bd%e6%95%b8%e6%93%9a-QxVUUldJDQ\">5. \u5b9a\u671f\u5099\u4efd\u6578\u64da<\/h2>\n<p>\u6578\u64da\u4e1f\u5931\u53ef\u80fd\u6703\u5c0d\u696d\u52d9\u9020\u6210\u56b4\u91cd\u5f71\u97ff\uff0c\u56e0\u6b64\u5b9a\u671f\u5099\u4efd\u6578\u64da\u81f3\u95dc\u91cd\u8981\u3002MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u5099\u4efd\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528 mysqldump \u5de5\u5177\uff1a<\/p>\n<pre><code>mysqldump -u username -p database_name &gt; backup.sql<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5c07\u6574\u500b\u6578\u64da\u5eab\u5c0e\u51fa\u5230\u4e00\u500b SQL \u6587\u4ef6\u4e2d\uff0c\u65b9\u4fbf\u65e5\u5f8c\u6062\u5fa9\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-QxVUUldJDQ\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1 MySQL \u7684\u4f7f\u7528\u6280\u5de7\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002\u5f9e\u4f7f\u7528\u7d22\u5f15\u548c JOIN \u9032\u884c\u9ad8\u6548\u67e5\u8a62\uff0c\u5230\u5229\u7528\u4e8b\u52d9\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\uff0c\u518d\u5230\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u9632\u6b62 SQL \u6ce8\u5165\uff0c\u9019\u4e9b\u6280\u5de7\u90fd\u662f\u6bcf\u4f4d\u958b\u767c\u8005\u61c9\u8a72\u719f\u6089\u7684\u3002\u6b64\u5916\uff0c\u5b9a\u671f\u5099\u4efd\u6578\u64da\u4e5f\u662f\u4fdd\u8b77\u6578\u64da\u7684\u91cd\u8981\u63aa\u65bd\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u4f86\u904b\u884c MySQL \u5c07\u662f\u660e\u667a\u4e4b\u8209\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 MySQL \u4f7f\u7528\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u638c\u63e1\u6700\u4f73\u5be6\u8e10\uff0c\u8b93\u4f60\u7684\u6578\u64da\u8655\u7406\u66f4\u6d41\u66a2\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-154537","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154537","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=154537"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154537\/revisions"}],"predecessor-version":[{"id":154538,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154537\/revisions\/154538"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}