QUERY PLAN
Aggregate (cost=53.03..53.04 rows=1 width=8)
-> Sort (cost=52.45..52.54 rows=39 width=218)
Sort Key: s.created_at DESC
-> HashAggregate (cost=51.03..51.42 rows=39 width=218)
Group Key: s.id
-> Hash Right Join (cost=35.57..48.97 rows=824 width=12)
Hash Cond: (thrs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_head_of_relationships thrs (cost=0.00..5.70 rows=370 width=4)
-> Hash (cost=33.01..33.01 rows=205 width=12)
-> Nested Loop (cost=13.78..33.01 rows=205 width=12)
-> Index Scan using tbl_users_pkey on tbl_users u (cost=0.14..8.16 rows=1 width=4)
Index Cond: (id = 1000)
Filter: (department_id = 10)
-> Hash Right Join (cost=13.64..22.79 rows=205 width=16)
Hash Cond: (turs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_user_relationships turs (cost=0.00..7.83 rows=483 width=4)
-> Hash (cost=13.15..13.15 rows=39 width=20)
-> Seq Scan on tbl_task_groups s (cost=0.00..13.15 rows=39 width=20)
Filter: (head_of = 1000)