Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'supp.supplier' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by code example
Example: groupby error in mysql
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';