QUERY PLAN
Limit (cost=4.49..4.50 rows=1 width=63)
-> Sort (cost=4.41..4.49 rows=32 width=63)
Sort Key: created_by DESC, created_at DESC
-> HashAggregate (cost=3.29..3.61 rows=32 width=63)
Group Key: id
-> Seq Scan on tbl_task_files s (cost=0.00..3.21 rows=32 width=63)
Filter: (task_group_id = 106)