Hive: Sum over a specified group (HiveQL)

Question

I have a table:

key    product_code    cost
1      UK              20
1      US              10
1      EU              5
2      UK              3
2      EU               


        

Answer 1

The table above looked like

key    product_code    cost
1      UK              20
1      US              10
1      EU              5
2      UK              3
2      EU              6

The user wanted a tabel with the total costs like the following

key    product_code    cost     total_costs
1      UK              20       35
1      US              10       35
1      EU              5        35
2      UK              3        9
2      EU              6        9

Therefor we used the following query

SELECT key, product_code,
SUM(costs) OVER (PARTITION BY key ORDER BY key ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)
FROM test;

So far so good. I want a column more, counting the occurences of each country

key    product_code    cost     total_costs     occurences
1      UK              20       35              2
1      US              10       35              1
1      EU              5        35              2
2      UK              3        9               2
2      EU              6        9               2

Therefor I used the following query

SELECT key, product_code,
SUM(costs) OVER (PARTITION BY key ORDER BY key ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) as total_costs
COUNT(product code) OVER (PARTITION BY key ORDER BY key ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) as occurences
FROM test;

Sadly this is not working. I get an cryptic error. To exclude an error in my query I want to ask if I did something wrong. Thanks