QUERY PLAN
Limit (cost=45.93..45.95 rows=10 width=388)
-> Sort (cost=45.93..46.00 rows=28 width=388)
Sort Key: s.created_at DESC
-> HashAggregate (cost=44.83..45.32 rows=28 width=388)
Group Key: s.id
-> Hash Right Join (cost=34.86..44.76 rows=28 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=34.80..34.80 rows=5 width=364)
-> Hash Right Join (cost=30.09..34.80 rows=5 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=30.05..30.05 rows=3 width=364)
-> Hash Join (cost=16.85..30.05 rows=3 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=4 width=4)
-> Seq Scan on tbl_users u (cost=0.00..16.80 rows=4 width=4)
Filter: (department_id = 3)