{"id":75946,"date":"2024-10-16T02:33:16","date_gmt":"2024-10-15T18:33:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75946\/"},"modified":"2024-10-16T02:33:16","modified_gmt":"2024-10-15T18:33:16","slug":"mysql-%e5%a4%9a%e8%a1%a8%e6%9b%b4%e6%96%b0%e5%92%8c%e5%a4%9a%e8%a1%a8%e5%88%aa%e9%99%a4%e7%9a%84%e5%af%a6%e7%8f%be","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75946\/","title":{"rendered":"MySQL \u591a\u8868\u66f4\u65b0\u548c\u591a\u8868\u522a\u9664\u7684\u5be6\u73fe"},"content":{"rendered":"<h1 id=\"mysql-%e5%a4%9a%e8%a1%a8%e6%9b%b4%e6%96%b0%e5%92%8c%e5%a4%9a%e8%a1%a8%e5%88%aa%e9%99%a4%e7%9a%84%e5%af%a6%e7%8f%be-PTgdJJTYbI\">MySQL \u591a\u8868\u66f4\u65b0\u548c\u591a\u8868\u522a\u9664\u7684\u5be6\u73fe<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL \u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u7576\u6d89\u53ca\u5230\u591a\u8868\u64cd\u4f5c\u6642\uff0c\u7279\u5225\u662f\u591a\u8868\u66f4\u65b0\u548c\u591a\u8868\u522a\u9664\uff0c\u4e86\u89e3\u5176\u5be6\u73fe\u65b9\u5f0f\u5c0d\u65bc\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 MySQL \u4e2d\u5be6\u73fe\u591a\u8868\u66f4\u65b0\u548c\u591a\u8868\u522a\u9664\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e8%a1%a8%e6%9b%b4%e6%96%b0%e7%9a%84%e5%af%a6%e7%8f%be-PTgdJJTYbI\">\u591a\u8868\u66f4\u65b0\u7684\u5be6\u73fe<\/h2>\n<p>\u591a\u8868\u66f4\u65b0\u662f\u6307\u540c\u6642\u66f4\u65b0\u591a\u500b\u8868\u4e2d\u7684\u6578\u64da\u3002\u9019\u901a\u5e38\u9700\u8981\u4f7f\u7528 JOIN \u8a9e\u53e5\u4f86\u9023\u63a5\u591a\u500b\u8868\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684\u591a\u8868\u66f4\u65b0\u793a\u4f8b\uff1a<\/p>\n<pre><code>UPDATE table1\nJOIN table2 ON table1.id = table2.foreign_id\nSET table1.column_name = 'new_value', table2.column_name = 'new_value'\nWHERE table1.condition_column = 'condition_value';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u66f4\u65b0\u4e86 <code>table1<\/code> \u548c <code>table2<\/code> \u4e2d\u7684\u6578\u64da\u3002\u9996\u5148\uff0c\u6211\u5011\u4f7f\u7528 JOIN \u5c07\u5169\u500b\u8868\u9023\u63a5\u8d77\u4f86\uff0c\u7136\u5f8c\u4f7f\u7528 SET \u8a9e\u53e5\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u5217\u548c\u65b0\u503c\u3002\u6700\u5f8c\uff0c\u4f7f\u7528 WHERE \u5b50\u53e5\u4f86\u9650\u5236\u66f4\u65b0\u7684\u7bc4\u570d\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-PTgdJJTYbI\">\u793a\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<code>employees<\/code> \u548c <code>departments<\/code>\u3002\u6211\u5011\u5e0c\u671b\u66f4\u65b0\u6240\u6709\u5728\u67d0\u500b\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\u7684\u85aa\u6c34\u548c\u90e8\u9580\u540d\u7a31\uff1a<\/p>\n<pre><code>UPDATE employees\nJOIN departments ON employees.department_id = departments.id\nSET employees.salary = employees.salary * 1.1, departments.name = '\u65b0\u90e8\u9580\u540d\u7a31'\nWHERE departments.name = '\u820a\u90e8\u9580\u540d\u7a31';<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u6240\u6709\u5728\u300c\u820a\u90e8\u9580\u540d\u7a31\u300d\u7684\u54e1\u5de5\u85aa\u6c34\u63d0\u9ad8 10%\uff0c\u4e26\u5c07\u90e8\u9580\u540d\u7a31\u66f4\u6539\u70ba\u300c\u65b0\u90e8\u9580\u540d\u7a31\u300d\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e8%a1%a8%e5%88%aa%e9%99%a4%e7%9a%84%e5%af%a6%e7%8f%be-PTgdJJTYbI\">\u591a\u8868\u522a\u9664\u7684\u5be6\u73fe<\/h2>\n<p>\u591a\u8868\u522a\u9664\u662f\u6307\u540c\u6642\u522a\u9664\u591a\u500b\u8868\u4e2d\u7684\u6578\u64da\u3002MySQL \u4e0d\u652f\u6301\u76f4\u63a5\u5728\u4e00\u500b DELETE \u8a9e\u53e5\u4e2d\u522a\u9664\u591a\u500b\u8868\u7684\u6578\u64da\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528 JOIN \u4f86\u522a\u9664\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u591a\u8868\u522a\u9664\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>DELETE table1, table2\nFROM table1\nJOIN table2 ON table1.id = table2.foreign_id\nWHERE table1.condition_column = 'condition_value';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u540c\u6642\u522a\u9664\u4e86 <code>table1<\/code> \u548c <code>table2<\/code> \u4e2d\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002\u4f7f\u7528 DELETE \u8a9e\u53e5\u6642\uff0c\u5fc5\u9808\u6307\u5b9a\u8981\u522a\u9664\u7684\u8868\uff0c\u4e26\u4f7f\u7528 JOIN \u4f86\u9023\u63a5\u5b83\u5011\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-PTgdJJTYbI\">\u793a\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<code>orders<\/code> \u548c <code>order_items<\/code>\u3002\u6211\u5011\u5e0c\u671b\u522a\u9664\u6240\u6709\u8207\u67d0\u500b\u8a02\u55ae\u76f8\u95dc\u7684\u8a18\u9304\uff1a<\/p>\n<pre><code>DELETE orders, order_items\nFROM orders\nJOIN order_items ON orders.id = order_items.order_id\nWHERE orders.status = '\u5df2\u53d6\u6d88';<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u522a\u9664\u6240\u6709\u72c0\u614b\u70ba\u300c\u5df2\u53d6\u6d88\u300d\u7684\u8a02\u55ae\u53ca\u5176\u76f8\u95dc\u7684\u8a02\u55ae\u9805\u76ee\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-PTgdJJTYbI\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9032\u884c\u591a\u8868\u66f4\u65b0\u548c\u522a\u9664\u6642\uff0c\u9700\u7279\u5225\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u4f7f\u7528\u6b63\u78ba\u7684 JOIN \u689d\u4ef6\uff0c\u4ee5\u907f\u514d\u610f\u5916\u522a\u9664\u6216\u66f4\u65b0\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u3002<\/li>\n<li>\u5728\u57f7\u884c\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u9032\u884c\u6578\u64da\u5099\u4efd\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li>\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u8868\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-PTgdJJTYbI\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u7684\u591a\u8868\u66f4\u65b0\u548c\u522a\u9664\u529f\u80fd\u70ba\u6578\u64da\u7ba1\u7406\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u548c\u6548\u7387\u3002\u901a\u904e\u4f7f\u7528 JOIN \u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u540c\u6642\u64cd\u4f5c\u591a\u500b\u8868\u4e2d\u7684\u6578\u64da\uff0c\u9019\u5c0d\u65bc\u7dad\u8b77\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u66f4\u65b0\u9084\u662f\u522a\u9664\uff0c\u6b63\u78ba\u7684 SQL \u8a9e\u53e5\u548c\u8b39\u614e\u7684\u64cd\u4f5c\u90fd\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4f86\u652f\u6301\u60a8\u7684 MySQL \u6578\u64da\u5eab\u904b\u884c\uff0c\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u80fd\u5920\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 MySQL \u4e2d\u591a\u8868\u66f4\u65b0\u548c\u522a\u9664\u7684\u5be6\u73fe\u65b9\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u9ad8\u6548\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u591a\u500b\u8868\u683c\u64cd\u4f5c\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-75946","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75946","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=75946"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75946\/revisions"}],"predecessor-version":[{"id":75947,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75946\/revisions\/75947"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}