EXPLAIN select l_orderkey, sum(l_extendedprice * (1 - l_discount)) as revenue, o_orderdate, o_shippriority from customer, orders, lineitem where c_mktsegment = 'FURNITURE' and c_custkey = o_custkey and l_orderkey = o_orderkey and o_orderdate < date '1995-03-31' and l_shipdate > date '1995-03-31' group by l_orderkey, o_orderdate, o_shippriority order by revenue desc, o_orderdate LIMIT 10; plan ------------------------------- sort groupjoin join tablescan hash lineitem tablescan tablescan customer orders (9 rows)