group by only_full_group_by code example
Example 1: which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));
Example 2: full sql mode
mysql > SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));