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--!syntax_pg
--TPC-H Q8
select
o_year,
sum(case
when nation = 'BRAZIL'
then volume
else 0::numeric
end) / (sum(volume) + 1e-12::numeric) as mkt_share
from (
select
extract(year from o_orderdate) as o_year,
l_extendedprice * (1::numeric-l_discount) as volume,
n2.n_name as nation
from
plato."part",
plato."supplier",
plato."lineitem",
plato."orders",
plato."customer",
plato."nation" n1,
plato."nation" n2,
plato."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
o_year
order by
o_year;
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