--
-- 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.
--
-- q86 --
select
  sum(ws_net_paid) as total_sum,
  i_category,
  i_class,
  grouping (i_category) + grouping (i_class) as lochierarchy,
  rank() over (
    partition by grouping (i_category) + grouping (i_class),
    case
      when grouping (i_class) = 0 then i_category
    end
    order by
      sum(ws_net_paid) desc
  ) as rank_within_parent
from
  web_sales,
  date_dim d1,
  item
where
  d1.d_month_seq between 1212
  and 1212 + 11
  and d1.d_date_sk = ws_sold_date_sk
  and i_item_sk = ws_item_sk
group by
  rollup (i_category, i_class)
order by
  lochierarchy desc,
  case
    when lochierarchy = 0 then i_category
  end,
  rank_within_parent
limit
  100;
