ELECT list is not in GROUP BY clause and contains nonaggregated column 'purchase.byt.buyingname' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by code example

Example: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column

SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));