QUERY PLAN
Limit (cost=57.38..57.41 rows=10 width=388)
-> Sort (cost=57.38..57.62 rows=94 width=388)
Sort Key: s.created_at DESC
-> HashAggregate (cost=53.71..55.35 rows=94 width=388)
Group Key: s.id
-> Hash Right Join (cost=38.15..52.52 rows=475 width=364)
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=37.00..37.00 rows=92 width=364)
-> Hash Right Join (cost=31.42..37.00 rows=92 width=364)
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=30.86..30.86 rows=45 width=364)
-> Hash Join (cost=17.66..30.86 rows=45 width=364)
Hash Cond: (s.head_of = u.id)
-> Seq Scan on tbl_task_groups s (cost=0.00..12.94 rows=94 width=364)
-> Hash (cost=16.80..16.80 rows=69 width=4)
-> Seq Scan on tbl_users u (cost=0.00..16.80 rows=69 width=4)
Filter: (department_id = 1)