QUERY PLAN
Aggregate (cost=38.28..38.29 rows=1 width=8)
-> Sort (cost=36.91..37.14 rows=91 width=222)
Sort Key: s.created_at DESC
-> HashAggregate (cost=33.04..33.95 rows=91 width=222)
Group Key: s.id
-> Hash Right Join (cost=20.60..32.51 rows=212 width=12)
Hash Cond: (turs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_user_relationships turs (cost=0.00..7.94 rows=494 width=4)
-> Hash (cost=20.11..20.11 rows=39 width=12)
-> Nested Loop (cost=7.05..20.11 rows=39 width=12)
-> Seq Scan on tbl_users thu (cost=0.00..8.16 rows=1 width=4)
Filter: ((id = 1000) AND (department_id = 10))
-> Hash Join (cost=7.05..11.56 rows=39 width=16)
Hash Cond: (thrs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_head_of_relationships thrs (cost=0.00..4.41 rows=39 width=8)
Filter: (user_id = 1000)
-> Hash (cost=5.91..5.91 rows=91 width=16)
-> Seq Scan on tbl_task_groups s (cost=0.00..5.91 rows=91 width=16)