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MySQL 两张表关联更新 用一张表的数据更新另一张表的数据UPDATE ars_room A JOIN ars_room_copy1 BON A.room_id=B.room_idSET A.room_name=B.room_name,A.hospital_id=B.hospital_idWHERE A.room_id='2'

查询：select sum(y1) as y, a.name from (SELECT count(1) as y1, sdd.dict_label as name FROM ars_appointment_info aai JOIN sys_dict_data…错误代码： 1055Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘zyars.sdd.dict_label’.

Windows下mysql-5.7.28配置教程总结如下：下载压缩包。百度云地址：https://pan.baidu.com/s/1TYl_lGPzQxw_RXz1j0QHNQ 提取码： y8wz在bin目录同级创建data文件夹和my.ini文件。编辑my.ini文件[mysqld]character-set-server=utf8bind-address = 0.0.0...