QUERY PLAN
Aggregate (cost=272.40..272.41 rows=1 width=32)
-> HashAggregate (cost=212.06..250.85 rows=1724 width=36)
Group Key: sc.id
-> Hash Right Join (cost=139.80..190.74 rows=2132 width=17)
Hash Cond: (sci.contract_id = sc.id)
-> Seq Scan on tbl_sales_contract_invoices sci (cost=0.00..45.33 rows=2133 width=10)
-> Hash (cost=118.25..118.25 rows=1724 width=15)
-> Seq Scan on tbl_sales_contracts sc (cost=0.00..118.25 rows=1724 width=15)
Filter: including_tax