Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'belkinca_store.o.name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by(No Description) sql: SELECT n.displayname, o.name FROM productoptionnames n, productoptions o, products p WHERE n.originalname = o.name AND o.product_id = p.id AND p.parent_id = '20850' GROUP BY n.displayname ORDER BY n.displayname DESC