QUERY PLAN
Limit (cost=63.65..63.68 rows=10 width=388)
-> Sort (cost=63.65..63.89 rows=94 width=388)
Sort Key: s.created_at DESC
-> HashAggregate (cost=59.98..61.62 rows=94 width=388)
Group Key: s.id
-> Hash Right Join (cost=45.12..57.70 rows=911 width=364)
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=42.23..42.23 rows=231 width=364)
-> Hash Join (cost=31.78..42.23 rows=231 width=364)
Hash Cond: (s.head_of = u.id)
-> Hash Right Join (cost=14.12..23.27 rows=483 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=12.94..12.94 rows=94 width=364)
-> 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)