{"id":200041,"date":"2025-05-06T08:12:15","date_gmt":"2025-05-06T00:12:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200041\/"},"modified":"2025-05-06T08:12:15","modified_gmt":"2025-05-06T00:12:15","slug":"%e4%bc%9a%e6%9c%89%e8%a1%a8%e7%ba%a7%e9%94%81%e5%ae%9a%e9%a3%8e%e9%99%a9%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200041\/","title":{"rendered":"\u4f1a\u6709\u8868\u7ea7\u9501\u5b9a\u98ce\u9669\u5417\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u4f1a\u6709\u8868\u7ea7\u9501\u5b9a\u98ce\u9669\u5417\uff1f<\/h1>\n<p>\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<p>MySQL\u7684UPDATE\u64cd\u4f5c\u662f\u5426\u4f1a\u9020\u6210\u8868\u7ea7\u9501\u5b9a\uff1f<\/p>\n<p>\u5728MySQL\u6570\u636e\u5e93\u4e2d\uff0c\u5f53\u6267\u884cUPDATE\u64cd\u4f5c\u65f6\uff0c\u662f\u5426\u4f1a\u9020\u6210\u8868\u7ea7\u9501\u5b9a\uff0c\u8fd9\u662f\u4e00\u4e2a\u5e38\u89c1\u800c\u53c8\u91cd\u8981\u7684\u95ee\u9898\u3002\u8868\u7ea7\u9501\u5b9a\u4f1a\u5f71\u54cd\u6570\u636e\u5e93\u7684\u5e76\u53d1\u6027\u80fd\uff0c\u56e0\u6b64\u4e86\u89e3UPDATE\u64cd\u4f5c\u662f\u5426\u4f1a\u5f15\u8d77\u8868\u7ea7\u9501\u5b9a\u5bf9\u4e8e\u4f18\u5316\u6570\u636e\u5e93\u7684\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>MySQL\u7684\u9501\u5b9a\u673a\u5236\u5206\u4e3a\u8868\u7ea7\u9501\u5b9a\u548c\u884c\u7ea7\u9501\u5b9a\u4e24\u79cd\u3002\u8868\u7ea7\u9501\u5b9a\u4f1a\u5728\u6574\u4e2a\u8868\u7ea7\u522b\u4e0a\u52a0\u9501\uff0c\u800c\u884c\u7ea7\u9501\u5b9a\u5219\u662f\u5728\u5355\u884c\u6570\u636e\u4e0a\u52a0\u9501\u3002\u4e00\u6761UPDATE\u8bed\u53e5\u901a\u5e38\u4f1a\u6d89\u53ca\u591a\u884c\u6570\u636e\u7684\u66f4\u65b0\uff0c\u56e0\u6b64\u53ef\u80fd\u4f1a\u5f15\u8d77\u8868\u7ea7\u9501\u5b9a\u3002\u4e0d\u8fc7\uff0cMySQL\u5e76\u4e0d\u603b\u662f\u4f1a\u76f4\u63a5\u4f7f\u7528\u8868\u7ea7\u9501\u5b9a\uff0c\u800c\u662f\u4f1a\u6839\u636e\u5177\u4f53\u60c5\u51b5\u548c\u4f7f\u7528\u7684\u5b58\u50a8\u5f15\u64ce\u6765\u51b3\u5b9a\u4f7f\u7528\u4f55\u79cd\u9501\u5b9a\u673a\u5236\u3002<\/p>\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u540c\u7684\u9501\u5b9a\u884c\u4e3a\u3002\u4f8b\u5982\uff0cInnoDB\u5b58\u50a8\u5f15\u64ce\u5728\u6267\u884cUPDATE\u64cd\u4f5c\u65f6\u4f1a\u4f7f\u7528\u884c\u7ea7\u9501\u5b9a\uff0c\u800cMyISAM\u5b58\u50a8\u5f15\u64ce\u5219\u503e\u5411\u4e8e\u4f7f\u7528\u8868\u7ea7\u9501\u5b9a\u3002\u56e0\u6b64\uff0c\u4e3a\u4e86\u907f\u514d\u8868\u7ea7\u9501\u5b9a\uff0c\u53ef\u4ee5\u8003\u8651\u5728InnoDB\u5b58\u50a8\u5f15\u64ce\u4e0b\u6267\u884cUPDATE\u64cd\u4f5c\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793aMySQL\u7684UPDATE\u64cd\u4f5c\u662f\u5426\u4f1a\u9020\u6210\u8868\u7ea7\u9501\u5b9a\u7684\u60c5\u51b5\u3002<\/p>\n<p>\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a&#8221;employees&#8221;\u7684\u8868\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>CREATE TABLE employees (\n    id INT PRIMARY KEY,\n    name VARCHAR(50),\n    age INT\n);<\/pre>\n<p>\u63a5\u7740\uff0c\u5f80\u8868&#8221;employees&#8221;\u4e2d\u63d2\u5165\u4e00\u4e9b\u6570\u636e\uff1a<\/p>\n<pre>INSERT INTO employees (id, name, age) VALUES\n(1, 'Alice', 25),\n(2, 'Bob', 30),\n(3, 'Charlie', 35);<\/pre>\n<p>\u73b0\u5728\uff0c\u6211\u4eec\u51c6\u5907\u6267\u884c\u4e00\u4e2aUPDATE\u64cd\u4f5c\uff0c\u5c06\u6240\u6709\u5458\u5de5\u7684\u5e74\u9f84\u52a0\u4e0a5\u5c81\uff1a<\/p>\n<pre>UPDATE employees SET age = age + 5;<\/pre>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u867d\u7136\u6211\u4eec\u6ca1\u6709\u663e\u793a\u5730\u6307\u5b9aWHERE\u5b50\u53e5\u6765\u9650\u5236\u66f4\u65b0\u7684\u6570\u636e\u884c\uff0c\u4f46MySQL\u4f1a\u9010\u884c\u5730\u66f4\u65b0\u6bcf\u4e00\u6761\u8bb0\u5f55\uff0c\u800c\u4e0d\u662f\u9501\u5b9a\u6574\u4e2a\u8868\u3002\u8fd9\u91cc\u4f7f\u7528\u7684\u662fInnoDB\u5b58\u50a8\u5f15\u64ce\uff0c\u56e0\u6b64\u4f1a\u4f7f\u7528\u884c\u7ea7\u9501\u5b9a\uff0c\u800c\u4e0d\u4f1a\u5bfc\u81f4\u8868\u7ea7\u9501\u5b9a\u3002<\/p>\n<p>\u603b\u7684\u6765\u8bf4\uff0cMySQL\u7684UPDATE\u64cd\u4f5c\u4e0d\u4e00\u5b9a\u4f1a\u9020\u6210\u8868\u7ea7\u9501\u5b9a\uff0c\u5177\u4f53\u662f\u5426\u4f1a\u9020\u6210\u8868\u7ea7\u9501\u5b9a\u53d6\u51b3\u4e8e\u4f7f\u7528\u7684\u5b58\u50a8\u5f15\u64ce\u4ee5\u53ca\u6267\u884c\u7684\u5177\u4f53\u60c5\u51b5\u3002\u4e3a\u4e86\u907f\u514d\u8868\u7ea7\u9501\u5b9a\uff0c\u53ef\u4ee5\u9009\u62e9\u9002\u5f53\u7684\u5b58\u50a8\u5f15\u64ce\u5e76\u5408\u7406\u8bbe\u8ba1SQL\u8bed\u53e5\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u4f1a\u6709\u8868\u7ea7\u9501\u5b9a\u98ce\u9669\u5417\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u8868\u7ea7\u9501\u5b9a\u68c0\u67e5\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n<dl>\n<dt>\n 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