this is incompatible with sql_mode=only_full_group_by问题

执行SQL:

SELECT login_name,login_ip,sex FROM tank_admin GROUP BY login_name ;

时抛出异常。

Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated 
column 'loser.tank_admin.login_ip' which is not functionally dependent on columns in GROUP BY clause;
this is incompatible with sql_mode=only_full_group_by

这个sql语句违背了sql_mode=only_full_group_by 。

解决办法:

1.用sql查询：

select @@global.sql_mode

结果显示：

ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

2.去掉ONLY_FULL_GROUP_BY，重新设置值。

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';