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-- 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.
--

--q76.sql--

 SELECT
    channel, col_name, d_year, d_qoy, i_category, COUNT(*) sales_cnt,
    SUM(ext_sales_price) sales_amt
 FROM(
    SELECT
        'store' as channel, ss_store_sk col_name, d_year, d_qoy, i_category,
        ss_ext_sales_price ext_sales_price
    FROM store_sales, item, date_dim
    WHERE ss_store_sk IS NULL
      AND ss_sold_date_sk=d_date_sk
      AND ss_item_sk=i_item_sk
    UNION ALL
    SELECT
        'web' as channel, ws_ship_customer_sk col_name, d_year, d_qoy, i_category,
        ws_ext_sales_price ext_sales_price
    FROM web_sales, item, date_dim
    WHERE ws_ship_customer_sk IS NULL
      AND ws_sold_date_sk=d_date_sk
      AND ws_item_sk=i_item_sk
    UNION ALL
    SELECT
        'catalog' as channel, cs_ship_addr_sk col_name, d_year, d_qoy, i_category,
        cs_ext_sales_price ext_sales_price
    FROM catalog_sales, item, date_dim
    WHERE cs_ship_addr_sk IS NULL
      AND cs_sold_date_sk=d_date_sk
      AND cs_item_sk=i_item_sk) foo
 GROUP BY channel, col_name, d_year, d_qoy, i_category
 ORDER BY channel, col_name, d_year, d_qoy, i_category
 limit 100
            
