--
-- 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.
--
-- q78 --
with ws as (
        select
                d_year AS ws_sold_year,
                ws_item_sk,
                ws_bill_customer_sk ws_customer_sk,
                sum(ws_quantity) ws_qty,
                sum(ws_wholesale_cost) ws_wc,
                sum(ws_sales_price) ws_sp
        from
                web_sales
                left join web_returns on wr_order_number = ws_order_number
                and ws_item_sk = wr_item_sk
                join date_dim on ws_sold_date_sk = d_date_sk
        where
                wr_order_number is null
        group by
                d_year,
                ws_item_sk,
                ws_bill_customer_sk
),
cs as (
        select
                d_year AS cs_sold_year,
                cs_item_sk,
                cs_bill_customer_sk cs_customer_sk,
                sum(cs_quantity) cs_qty,
                sum(cs_wholesale_cost) cs_wc,
                sum(cs_sales_price) cs_sp
        from
                catalog_sales
                left join catalog_returns on cr_order_number = cs_order_number
                and cs_item_sk = cr_item_sk
                join date_dim on cs_sold_date_sk = d_date_sk
        where
                cr_order_number is null
        group by
                d_year,
                cs_item_sk,
                cs_bill_customer_sk
),
ss as (
        select
                d_year AS ss_sold_year,
                ss_item_sk,
                ss_customer_sk,
                sum(ss_quantity) ss_qty,
                sum(ss_wholesale_cost) ss_wc,
                sum(ss_sales_price) ss_sp
        from
                store_sales
                left join store_returns on sr_ticket_number = ss_ticket_number
                and ss_item_sk = sr_item_sk
                join date_dim on ss_sold_date_sk = d_date_sk
        where
                sr_ticket_number is null
        group by
                d_year,
                ss_item_sk,
                ss_customer_sk
)
select
        ss_sold_year,
        ss_item_sk,
        ss_customer_sk,
        round(
                ss_qty / (coalesce(ws_qty, 0) + coalesce(cs_qty, 0)),
                2
        ) ratio,
        ss_qty store_qty,
        ss_wc store_wholesale_cost,
        ss_sp store_sales_price,
        coalesce(ws_qty, 0) + coalesce(cs_qty, 0) other_chan_qty,
        coalesce(ws_wc, 0) + coalesce(cs_wc, 0) other_chan_wholesale_cost,
        coalesce(ws_sp, 0) + coalesce(cs_sp, 0) other_chan_sales_price
from
        ss
        left join ws on (
                ws_sold_year = ss_sold_year
                and ws_item_sk = ss_item_sk
                and ws_customer_sk = ss_customer_sk
        )
        left join cs on (
                cs_sold_year = ss_sold_year
                and cs_item_sk = ss_item_sk
                and cs_customer_sk = ss_customer_sk
        )
where
        (
                coalesce(ws_qty, 0) > 0
                or coalesce(cs_qty, 0) > 0
        )
        and ss_sold_year = 2000
order by
        ss_sold_year,
        ss_item_sk,
        ss_customer_sk,
        ss_qty desc,
        ss_wc desc,
        ss_sp desc,
        other_chan_qty,
        other_chan_wholesale_cost,
        other_chan_sales_price,
        ratio
limit
        100;
