QUERY PLAN
Limit (cost=32.65..32.67 rows=10 width=396)
-> Sort (cost=32.65..32.83 rows=73 width=396)
Sort Key: s.created_at DESC
-> HashAggregate (cost=29.79..31.07 rows=73 width=396)
Group Key: s.id
-> Hash Right Join (cost=19.11..29.61 rows=73 width=372)
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=18.94..18.94 rows=13 width=372)
-> Hash Right Join (cost=14.16..18.94 rows=13 width=372)
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=14.09..14.09 rows=6 width=372)
-> Hash Join (cost=7.92..14.09 rows=6 width=372)
Hash Cond: (s.head_of = u.id)
-> Seq Scan on tbl_task_groups s (cost=0.00..5.91 rows=91 width=372)
-> Hash (cost=7.80..7.80 rows=10 width=4)
-> Seq Scan on tbl_users u (cost=0.00..7.80 rows=10 width=4)
Filter: (department_id = 4)