{"id":154545,"date":"2024-11-02T16:42:22","date_gmt":"2024-11-02T08:42:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154545\/"},"modified":"2024-11-02T16:42:23","modified_gmt":"2024-11-02T08:42:23","slug":"%e5%b0%8d-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b0%8f%e6%8a%80%e5%b7%a7%e6%a6%82%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154545\/","title":{"rendered":"\u5c0d MySQL \u6578\u64da\u5eab\u5c0f\u6280\u5de7\u6982\u8ff0"},"content":{"rendered":"<h1 id=\"%e5%b0%8d-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b0%8f%e6%8a%80%e5%b7%a7%e6%a6%82%e8%bf%b0-LJIspjyURo\">\u5c0d MySQL \u6578\u64da\u5eab\u5c0f\u6280\u5de7\u6982\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\u4ecb\u7d39\u4e00\u4e9b MySQL \u7684\u5c0f\u6280\u5de7\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u4f7f\u7528\u9019\u500b\u5f37\u5927\u7684\u6578\u64da\u5eab\u7cfb\u7d71\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-LJIspjyURo\">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\u91cd\u8981\u5de5\u5177\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\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u4e26\u5e0c\u671b\u52a0\u5feb\u5c0d <code>email<\/code> \u5217\u7684\u67e5\u8a62\u901f\u5ea6\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-LJIspjyURo\">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\u4f7f\u7528 INNER JOIN \u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>SELECT columns FROM table1 INNER JOIN table2 ON table1.column = table2.column;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868 <code>orders<\/code> \u548c <code>customers<\/code>\uff0c\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u67e5\u8a62\u4f86\u7372\u53d6\u6bcf\u500b\u8a02\u55ae\u53ca\u5176\u5c0d\u61c9\u7684\u5ba2\u6236\u4fe1\u606f\uff1a<\/p>\n<pre><code>SELECT orders.id, customers.name FROM orders INNER JOIN customers ON orders.customer_id = customers.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-LJIspjyURo\">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\u548c\u5b8c\u6574\u6027\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u4e8b\u52d9\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>START TRANSACTION;\n-- SQL \u64cd\u4f5c\nCOMMIT; -- \u6216 ROLLBACK; \u6839\u64da\u9700\u8981<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5728\u8655\u7406\u8a02\u55ae\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u5728\u66f4\u65b0\u5eab\u5b58\u548c\u5275\u5efa\u8a02\u55ae\u4e4b\u9593\u7684\u4e00\u81f4\u6027\uff1a<\/p>\n<pre><code>START TRANSACTION;\nUPDATE inventory SET quantity = quantity - 1 WHERE product_id = 1;\nINSERT INTO orders (product_id, quantity) VALUES (1, 1);\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-LJIspjyURo\">4. \u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u63d0\u9ad8\u5b89\u5168\u6027\u548c\u6027\u80fd<\/h2>\n<p>\u9810\u8655\u7406\u8a9e\u53e5\u53ef\u4ee5\u9632\u6b62 SQL \u6ce8\u5165\u653b\u64ca\uff0c\u4e26\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\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 = 'example@example.com';\nEXECUTE stmt USING @email;\nDEALLOCATE PREPARE stmt;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u505a\u6cd5\u4e0d\u50c5\u63d0\u9ad8\u4e86\u5b89\u5168\u6027\uff0c\u9084\u80fd\u5728\u591a\u6b21\u57f7\u884c\u76f8\u540c\u67e5\u8a62\u6642\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h2 id=\"5-%e5%ae%9a%e6%9c%9f%e5%82%99%e4%bb%bd%e6%95%b8%e6%93%9a-LJIspjyURo\">5. \u5b9a\u671f\u5099\u4efd\u6578\u64da<\/h2>\n<p>\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\u7528 <code>mysqldump<\/code> \u5de5\u5177\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>mysqldump<\/code> \u9032\u884c\u5099\u4efd\u7684\u57fa\u672c\u547d\u4ee4\uff1a<\/p>\n<pre><code>mysqldump -u username -p database_name &gt; backup_file.sql<\/code><\/pre>\n<p>\u5b9a\u671f\u5099\u4efd\u6578\u64da\u53ef\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\uff0c\u4e26\u5728\u767c\u751f\u6545\u969c\u6642\u5feb\u901f\u6062\u5fa9\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LJIspjyURo\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1 MySQL \u7684\u4e00\u4e9b\u5c0f\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 MySQL \u7528\u6236\u61c9\u8a72\u4e86\u89e3\u7684\u57fa\u672c\u77e5\u8b58\u3002\u6b64\u5916\uff0c\u5b9a\u671f\u5099\u4efd\u6578\u64da\u4e5f\u662f\u4fdd\u8b77\u6578\u64da\u7684\u91cd\u8981\u6b65\u9a5f\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> \u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684 MySQL \u6578\u64da\u5eab\u63d0\u4f9b\u7a69\u5b9a\u7684\u904b\u884c\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 MySQL \u6578\u64da\u5eab\u7684\u5c0f\u6280\u5de7\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u3001\u512a\u5316\u6027\u80fd\uff0c\u8b93\u6578\u64da\u7ba1\u7406\u66f4\u8f15\u9b06\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-154545","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154545","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=154545"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154545\/revisions"}],"predecessor-version":[{"id":154546,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154545\/revisions\/154546"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}