-- @@@ START COPYRIGHT @@@
--
-- Licensed to the Apache Software Foundation (ASF) under one
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-- 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
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-- @@@ END COPYRIGHT @@@
obey regr.init;
-- Q8
    select 
        yr, sum(case when nat = 'BRAZIL' then volume else 0 end)
        /sum(volume) as mkt_share
    from
        (select
             extract(year from o_orderdate) as yr,
             l_extendedprice*(1-l_discount) as volume,
             n2.n_name as nat
         from part,supplier,lineitem,orders,customer,
             nation n1, nation  n2, region
         where 
             p_partkey = l_partkey
             and s_suppkey = l_suppkey
             and l_orderkey = o_orderkey
             and o_custkey = c_custkey
             and c_nationkey = n1.n_nationkey
             and n1.n_regionkey = r_regionkey
             and r_name = 'AMERICA'
             and s_nationkey = n2.n_nationkey
             and o_orderdate between date '1995-01-01' and date '1996-12-31'
             and p_type ='ECONOMY ANODIZED STEEL'
        ) as all_nations
    group by yr;