QUERY PLAN
Aggregate (cost=45.87..45.88 rows=1 width=8)
-> Sort (cost=45.29..45.39 rows=39 width=222)
Sort Key: s.created_at DESC
-> HashAggregate (cost=43.87..44.26 rows=39 width=222)
Group Key: s.id
-> Hash Right Join (cost=28.12..42.77 rows=439 width=12)
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=27.08..27.08 rows=83 width=12)
-> Nested Loop (cost=13.77..27.08 rows=83 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=13.62..18.08 rows=83 width=16)
Hash Cond: (thrs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_head_of_relationships thrs (cost=0.00..3.93 rows=193 width=4)
-> Hash (cost=13.14..13.14 rows=39 width=20)
-> Seq Scan on tbl_task_groups s (cost=0.00..13.14 rows=39 width=20)
Filter: (head_of = 1000)