{"id":7966,"date":"2024-11-14T09:33:31","date_gmt":"2024-11-14T01:33:31","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7966\/"},"modified":"2024-11-14T09:33:31","modified_gmt":"2024-11-14T01:33:31","slug":"mysql-%e6%9f%a5%e8%af%a2%e9%80%89%e6%8b%a9%e5%ad%97%e6%ae%b5%ef%bc%8c%e4%bc%9a%e8%ae%a9%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7966\/","title":{"rendered":"MySQL \u67e5\u8be2\u9009\u62e9\u5b57\u6bb5\uff0c\u4f1a\u8ba9\u7d22\u5f15\u5931\u6548\u5417\uff1f"},"content":{"rendered":"

\"MySQL<\/p>\n

\u67e5\u8be2\u9009\u62e9\u5b57\u6bb5\uff0c\u4f1a\u5bfc\u81f4\u7d22\u5f15\u65e0\u6548\u5417\uff1f<\/strong><\/p>\n

\u672c\u6587\u5c06\u63a2\u8ba8\u5f53\u9009\u53d6\u7279\u5b9a\u5b57\u6bb5\u65f6\u7d22\u5f15\u5931\u6548\u7684\u95ee\u9898\u3002\u8ba9\u6211\u4eec\u4ee5\u4e00\u4e2a\u4f8b\u5b50\u6765\u8bf4\u660e\u3002<\/p>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5982\u4e0b\u6240\u793a\u7684sql\u67e5\u8be2\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
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5728\u8fd9\u4e2a\u67e5\u8be2\u4e2d\uff0c\u5f53\u6211\u4eec\u6ce8\u91ca\u6389 pc.name \u5b57\u6bb5\u65f6\uff0c\u5b83\u80fd\u591f\u4f7f\u7528\u7d22\u5f15\uff0c\u4f46\u5728\u6dfb\u52a0\u8be5\u5b57\u6bb5\u540e\u95ee\u9898\u5c31\u51fa\u73b0\u4e86\u3002<\/p>\n
\u7b54\u6848\u5728\u4e8e\u7d22\u5f15\u7c7b\u578b\u548c\u6570\u636e\u957f\u5ea6\u3002\u7d22\u5f15\u662f\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u6570\u636e\u7684\u6811\u72b6\u6570\u636e\u7ed3\u6784\uff0c\u5176\u957f\u5ea6\u9650\u5236\u53d7\u5176\u5305\u542b\u7684\u5b57\u6bb5\u957f\u5ea6\u9650\u5236\u3002<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4e3b\u952e\u7d22\u5f15\u662f dev_device_log \u8868\u4e2d\u7684 id \u5b57\u6bb5\u3002\u4f46\u662f\uff0c\u5f53\u9009\u62e9 pc.name \u5b57\u6bb5\u65f6\uff0c\u9700\u8981\u4f7f\u7528\u8986\u76d6\u7d22\u5f15\uff0c\u8986\u76d6\u7d22\u5f15\u5305\u542b\u67e5\u8be2\u4e2d\u6240\u6709\u5fc5\u9700\u7684\u5b57\u6bb5\uff0c\u4ee5\u907f\u514d\u56de\u8868\u64cd\u4f5c\u3002<\/p>\n
base_project_court \u8868\u4e2d name \u5b57\u6bb5\u7684\u957f\u5ea6\u4e3a varchar(30)\uff0c\u5b57\u7b26\u96c6\u4e3a utf8mb4\u3002\u8fd9\u610f\u5473\u7740\u4e00\u4e2a\u5b57\u7b26\u5360\u7528 4 \u5b57\u8282\u3002\u56e0\u6b64\uff0c\u7d22\u5f15\u957f\u5ea6\u4e3a 30 * 4 + varchar \u7684\u524d\u7f00\u957f\u5ea6\u3002<\/p>\n
mysql \u4f18\u5316\u5668\u5728\u67e5\u8be2\u65f6\u4f1a\u8bc4\u4f30\u4f7f\u7528\u7d22\u5f15\u548c\u56de\u8868\u7684\u6548\u7387\uff0c\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4f18\u5316\u5668\u53ef\u80fd\u4f1a\u8ba4\u4e3a\u56de\u8868\u7684\u6548\u7387\u6bd4\u4f7f\u7528\u7d22\u5f15\u66f4\u9ad8\uff0c\u56e0\u4e3a\u8be5\u7d22\u5f15\u957f\u5ea6\u8f83\u5927\uff0c\u65e0\u6cd5\u6ee1\u8db3\u8986\u76d6\u7d22\u5f15\u7684\u8981\u6c42\u3002<\/p>\n
\u901a\u8fc7\u5728 id \u548c name \u5b57\u6bb5\u4e0a\u521b\u5efa\u590d\u5408\u7d22\u5f15\uff0c\u6211\u4eec\u53ef\u4ee5\u6539\u5584\u8fd9\u79cd\u60c5\u51b5\u3002\u590d\u5408\u7d22\u5f15\u7684\u957f\u5ea6\u8f83\u77ed\uff0c\u4f18\u5316\u5668\u66f4\u613f\u610f\u5c06\u5176\u7528\u4e8e\u8986\u76d6\u7d22\u5f15\u3002<\/p>\n
\u7efc\u4e0a\u6240\u8ff0\uff0c\u5f53\u67e5\u8be2\u4e2d\u9009\u62e9\u7684\u5b57\u6bb5\u4f1a\u5f71\u54cd\u7d22\u5f15\u7684\u957f\u5ea6\u5e76\u8d85\u51fa\u5176\u9650\u5236\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u3002\u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u67e5\u8be2\u65f6\uff0c\u9700\u8981\u8003\u8651\u5b57\u6bb5\u957f\u5ea6\u548c\u7d22\u5f15\u7c7b\u578b\uff0c\u4ee5\u786e\u4fdd\u67e5\u8be2\u6027\u80fd\u5f97\u5230\u4f18\u5316\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662fMySQL \u67e5\u8be2\u9009\u62e9\u5b57\u6bb5\uff0c\u4f1a\u8ba9\u7d22\u5f15\u5931\u6548\u5417\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u67e5\u8be2\u9009\u62e9\u5b57\u6bb5\uff0c\u4f1a\u5bfc\u81f4\u7d22\u5f15\u65e0\u6548\u5417\uff1f \u672c\u6587\u5c06\u63a2\u8ba8\u5f53\u9009\u53d6\u7279\u5b9a\u5b57\u6bb5\u65f6\u7d22\u5f15\u5931\u6548\u7684\u95ee\u9898\u3002\u8ba9\u6211\u4eec\u4ee5\u4e00\u4e2a\u4f8b\u5b50\u6765\u8bf4\u660e\u3002 \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5982\u4e0b\u6240\u793a\u7684sql\u67e5\u8be2\uff1a SELECT dl.`user_type` AS userType, dl.`user_name` AS userName, dl.`phone` AS userPhone, pc.`name` AS courtName, dl.`build_unit` AS buildName, dl.`dev_name` AS deviceName, dl.`dev_no` AS deviceNo, dl.`create_time` AS openTime, dl.`status` FROM dev_device_log dl LEFT JOIN base_project_court pc ON dl.`court_id` = pc.`id` ORDER BY dl.`id` DESC LIMIT 0, 100; \u767b\u5f55\u540e\u590d\u5236 \u5728\u8fd9\u4e2a\u67e5\u8be2\u4e2d\uff0c\u5f53\u6211\u4eec\u6ce8\u91ca\u6389 pc.name \u5b57\u6bb5\u65f6\uff0c\u5b83\u80fd\u591f\u4f7f\u7528\u7d22\u5f15\uff0c\u4f46\u5728\u6dfb\u52a0\u8be5\u5b57\u6bb5\u540e\u95ee\u9898\u5c31\u51fa\u73b0\u4e86\u3002 \u7b54\u6848\u5728\u4e8e\u7d22\u5f15\u7c7b\u578b\u548c\u6570\u636e\u957f\u5ea6\u3002\u7d22\u5f15\u662f\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u6570\u636e\u7684\u6811\u72b6\u6570\u636e\u7ed3\u6784\uff0c\u5176\u957f\u5ea6\u9650\u5236\u53d7\u5176\u5305\u542b\u7684\u5b57\u6bb5\u957f\u5ea6\u9650\u5236\u3002 \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4e3b\u952e\u7d22\u5f15\u662f dev_device_log \u8868\u4e2d\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7966","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7966","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=7966"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7966\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}