QUERY PLAN
Aggregate (cost=32.03..32.04 rows=1 width=8)
-> Sort (cost=32.01..32.02 rows=1 width=222)
Sort Key: s.created_at DESC
-> HashAggregate (cost=31.99..32.00 rows=1 width=222)
Group Key: s.id
-> Nested Loop (cost=11.96..31.93 rows=26 width=12)
-> Index Scan using tbl_users_pkey on tbl_users u (cost=0.14..8.16 rows=1 width=4)
Index Cond: (id = 5300)
Filter: (department_id = 1)
-> Hash Right Join (cost=11.82..23.50 rows=26 width=16)
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=11.77..11.77 rows=4 width=16)
-> Hash Right Join (cost=5.08..11.77 rows=4 width=16)
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=5.06..5.06 rows=1 width=20)
-> Seq Scan on tbl_task_groups s (cost=0.00..5.06 rows=1 width=20)
Filter: (head_of = 5300)