--
-- 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.
--

WITH ss AS (
  SELECT
    i_item_id,
    sum(ss_ext_sales_price) total_sales
  FROM store_sales, date_dim, customer_address, item
  WHERE
    i_item_id IN (SELECT i_item_id
    FROM item
    WHERE i_category IN ('Music'))
      AND ss_item_sk = i_item_sk
      AND ss_sold_date_sk = d_date_sk
      AND d_year = 1998
      AND d_moy = 9
      AND ss_addr_sk = ca_address_sk
      AND ca_gmt_offset = -5
  GROUP BY i_item_id),
    cs AS (
    SELECT
      i_item_id,
      sum(cs_ext_sales_price) total_sales
    FROM catalog_sales, date_dim, customer_address, item
    WHERE
      i_item_id IN (SELECT i_item_id
      FROM item
      WHERE i_category IN ('Music'))
        AND cs_item_sk = i_item_sk
        AND cs_sold_date_sk = d_date_sk
        AND d_year = 1998
        AND d_moy = 9
        AND cs_bill_addr_sk = ca_address_sk
        AND ca_gmt_offset = -5
    GROUP BY i_item_id),
    ws AS (
    SELECT
      i_item_id,
      sum(ws_ext_sales_price) total_sales
    FROM web_sales, date_dim, customer_address, item
    WHERE
      i_item_id IN (SELECT i_item_id
      FROM item
      WHERE i_category IN ('Music'))
        AND ws_item_sk = i_item_sk
        AND ws_sold_date_sk = d_date_sk
        AND d_year = 1998
        AND d_moy = 9
        AND ws_bill_addr_sk = ca_address_sk
        AND ca_gmt_offset = -5
    GROUP BY i_item_id)
SELECT
  i_item_id,
  sum(total_sales) total_sales
FROM (SELECT *
      FROM ss
      UNION ALL
      SELECT *
      FROM cs
      UNION ALL
      SELECT *
      FROM ws) tmp1
GROUP BY i_item_id
ORDER BY i_item_id, total_sales
LIMIT 100
