I made a post today on that but nobody did answer my question.
I'm getting SQL error "this is incompatible with sql_mode=only_full_group_by". I did execute this SQL command:
SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));
But it does not work. Error still remains.
I can't adjust every query in the DB because there is are too much of them. I need quick solution. Is there anybody that is able to help me?