{"id":200786,"date":"2025-05-06T09:26:02","date_gmt":"2025-05-06T01:26:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200786\/"},"modified":"2025-05-06T09:26:02","modified_gmt":"2025-05-06T01:26:02","slug":"%e5%a4%9a%e5%ad%97%e6%ae%b5%e6%9f%a5%e8%af%a2%e5%af%bc%e8%87%b4%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%ef%bc%9f%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3-mysql-%e6%9f%a5%e8%af%a2%e4%b8%ad%e7%9a%84%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200786\/","title":{"rendered":"\u591a\u5b57\u6bb5\u67e5\u8be2\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\uff1f\u5982\u4f55\u89e3\u51b3 MySQL \u67e5\u8be2\u4e2d\u7684\u7d22\u5f15\u5931\u6548\u95ee\u9898\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u591a\u5b57\u6bb5\u67e5\u8be2\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\uff1f\u5982\u4f55\u89e3\u51b3 MySQL \u67e5\u8be2\u4e2d\u7684\u7d22\u5f15\u5931\u6548\u95ee\u9898\uff1f <\/h1>\n

\u5b66\u4e60\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0\u5c06\u4f1a\u4ecb\u7ecd\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

<\/p>\n

\u591a\u5b57\u6bb5\u67e5\u8be2\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\uff1f<\/p>\n

\u5728\u4f7f\u7528 mysql \u7684 select \u67e5\u8be2\u65f6\uff0c\u67e5\u8be2\u5b57\u6bb5\u53ef\u80fd\u4f1a\u5f71\u54cd\u7d22\u5f15\u7684\u4f7f\u7528\u3002\u6700\u8fd1\uff0c\u6709\u4f4d\u5f00\u53d1\u8005\u9047\u5230\u4e86\u4e00\u4e2a\u95ee\u9898\uff1a\u4ed6\u7684 sql \u67e5\u8be2\u5728\u53ea\u6709\u51e0\u767e\u6761\u6570\u636e\u65f6\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\uff0c\u4f46\u662f\u5bfc\u5165\u51e0\u4e07\u6761\u6570\u636e\u540e\u5c31\u65e0\u6cd5\u4f7f\u7528\u4e86\u3002<\/p>\n

\u67e5\u8be2\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

SELECT\n  dl.`user_type` AS userType,\n  dl.`user_name` AS userName,\n  dl.`phone` AS userPhone,\n  pc.`name` AS courtName,\n  dl.`build_unit` AS buildName,\n  dl.`dev_name` AS deviceName,\n  dl.`dev_no` AS deviceNo,\n  dl.`create_time` AS openTime,\n  dl.`status`\nFROM\n  dev_device_log dl\n  LEFT JOIN base_project_court pc\n    ON dl.`court_id` = pc.`id`\nORDER BY dl.`id` DESC\nLIMIT 0, 100;<\/pre>\n
\u4ee4\u4eba\u4e0d\u89e3\u7684\u662f\uff0c\u5f53\u6ce8\u91ca\u6389 pc.name \u5b57\u6bb5\u65f6\uff0c\u67e5\u8be2\u5c31\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u4e86\u3002<\/p>\n
\u7ecf\u8fc7\u5206\u6790\uff0c\u95ee\u9898\u51fa\u5728\u7d22\u5f15\u8986\u76d6\u4e4b\u4e0a\u3002\u56e0\u4e3a\u4e3b\u952e\u7d22\u5f15\u5b57\u6bb5\u662f varchar(32)\uff0c\u4f7f\u7528 utf8mb4 \u5b57\u7b26\u96c6\uff0c\u6bcf\u4e2a\u5b57\u7b26\u5360\u7528 4 \u5b57\u8282\u3002\u56e0\u6b64\uff0c\u4e3b\u952e\u7d22\u5f15\u7684\u957f\u5ea6\u4e3a 130 \u5b57\u8282\uff0cmysql \u4f18\u5316\u5668\u8ba4\u4e3a\u76f4\u63a5\u5168\u8868\u67e5\u8be2\u6bd4\u9010\u884c\u68c0\u7d22\u66f4\u6709\u6548\u7387\uff0c\u4e8e\u662f\u653e\u5f03\u4e86\u7d22\u5f15\u3002<\/p>\n
\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u5728 base_project_court \u8868\u4e0a\u521b\u5efa\u5305\u542b id \u548c name \u5b57\u6bb5\u7684\u7ec4\u5408\u7d22\u5f15\u3002\u8fd9\u6837\uff0c\u67e5\u8be2\u5c31\u53ef\u4ee5\u76f4\u63a5\u4ece\u7d22\u5f15\u4e2d\u83b7\u53d6\u6240\u9700\u7684\u6570\u636e\uff0c\u65e0\u9700\u56de\u8868\uff0c\u4ece\u800c\u907f\u514d\u7d22\u5f15\u5931\u6548\u3002<\/p>\n
\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6570\u636e\u5e93\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n
\n
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