SELECT i_item_id ,

i_item_desc,

i_category,

i_class,

i_current_price ,

sum(ss_ext_sales_price) AS itemrevenue,

sum(ss_ext_sales_price)*100.0000/sum(sum(ss_ext_sales_price)) OVER (PARTITION BY i_class) AS revenueratio

FROM store_sales ,

item,

date_dim

WHERE ss_item_sk = i_item_sk

AND i_category IN ('Sports',

'Books',

'Home')

AND ss_sold_date_sk = d_date_sk

AND d_date BETWEEN cast('1999-02-22' AS date) AND cast('1999-03-24' AS date)

GROUP BY i_item_id ,

i_item_desc,

i_category ,

i_class ,

i_current_price

ORDER BY i_category NULLS FIRST,

i_class NULLS FIRST,

i_item_id NULLS FIRST,

i_item_desc NULLS FIRST,

revenueratio NULLS FIRST;