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select i_item_id
,i_item_desc
,i_category
,i_class
,i_current_price
,sum(cs_ext_sales_price) as itemrevenue
,sum(cs_ext_sales_price)*100/sum(sum(cs_ext_sales_price)) over
(partition by i_class) as revenueratio
from catalog_sales
,item
,date_dim
where cs_item_sk = i_item_sk
and i_category in ('Jewelry', 'Sports', 'Books')
and cs_sold_date_sk = d_date_sk
and d_date between cast('2001-01-12' as date)
and (cast('2001-01-12' as date) + 30 days)
group by i_item_id
,i_item_desc
,i_category
,i_class
,i_current_price
order by i_category
,i_class
,i_item_id
,i_item_desc
,revenueratio
limit 100;
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