Error Code: 1055. sql_mode=only_full_group_by

问题描述

在写Controller里发现不能返回查询结果，然后把DAO的sql查询语句放进mysql里面查一下，语句本身没有错但是出现下面的报错语句：

Error Code: 1055. Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘tt.from_id’ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

问题解决

直接输入下面两个命令

mysql> set global sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

mysql> set session sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

参考

https://blog.youkuaiyun.com/fansili/article/details/78664267