should be it

external/duckdb/benchmark/tpch_plan_cost/queries/q08.sql

@@ -0,0 +1,38 @@
+SELECT
+    o_year,
+    sum(
+        CASE WHEN nation = 'BRAZIL' THEN
+            volume
+        ELSE
+            0
+        END) / sum(volume) AS mkt_share
+FROM (
+    SELECT
+        extract(year FROM o_orderdate) AS o_year,
+        l_extendedprice * (1 - l_discount) AS volume,
+        n2.n_name AS nation
+    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 CAST('1995-01-01' AS date)
+        AND CAST('1996-12-31' AS date)
+        AND p_type = 'ECONOMY ANODIZED STEEL') AS all_nations
+GROUP BY
+    o_year
+ORDER BY
+    o_year;