Perfect solution to MySql version problem sql_mode=only_full_group_by

1. View sql_mode

select @@sql_mode

The queried value is:

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. Remove ONLY_FULL_GROUP_BY and reset the value.

set @@sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER
,NO_ENGINE_SUBSTITUTION';

3. The above changes the global sql_mode, which is valid for the newly built database. For existing databases, you need to execute under the corresponding data:

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