/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

USE tpch;

SELECT n_name, sum(o1.l_extendedprice * (1 - o1.l_discount)) AS revenue
FROM
  Customer c JOIN
    ( SELECT l1.n_name, l1.l_extendedprice, l1.l_discount, l1.s_nationkey, o.o_custkey
      FROM Orders o JOIN
      ( SELECT s1.n_name, l.l_extendedprice, l.l_discount, l.l_orderkey, s1.s_nationkey
        FROM LineItem l JOIN
            (   SELECT n1.n_name, s.s_suppkey, s.s_nationkey
                FROM Supplier s JOIN
                (   SELECT n.n_name, n.n_nationkey
                    FROM Nation n JOIN Region r
                    ON n.n_regionkey = r.r_regionkey
                ) n1 ON s.s_nationkey = n1.n_nationkey
            ) s1
        ON l.l_suppkey = s1.s_suppkey
      ) l1 ON l1.l_orderkey = o.o_orderkey AND o.o_orderdate >= '1990-01-01'
              AND o.o_orderdate < '1995-01-01'
   ) o1
ON c.c_nationkey = o1.s_nationkey AND c.c_custkey = o1.o_custkey
GROUP BY o1.n_name
ORDER BY revenue DESC;