--
-- 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.
--
-- q40 --
select
    w_state,
    i_item_id,
    sum(
        case
            when (
                cast(d_date as date) < cast('1998-04-08' as date)
            ) then cs_sales_price - coalesce(cr_refunded_cash, 0)
            else 0
        end
    ) as sales_before,
    sum(
        case
            when (
                cast(d_date as date) >= cast('1998-04-08' as date)
            ) then cs_sales_price - coalesce(cr_refunded_cash, 0)
            else 0
        end
    ) as sales_after
from
    catalog_sales
    left outer join catalog_returns on (
        cs_order_number = cr_order_number
        and cs_item_sk = cr_item_sk
    ),
    warehouse,
    item,
    date_dim
where
    i_current_price between 0.99
    and 1.49
    and i_item_sk = cs_item_sk
    and cs_warehouse_sk = w_warehouse_sk
    and cs_sold_date_sk = d_date_sk
    and d_date between (cast('1998-04-08' as date) - interval 30 days)
    and (cast('1998-04-08' as date) + interval 30 days)
group by
    w_state,
    i_item_id
order by
    w_state,
    i_item_id
limit
    100;
