DSB Q025

select top 100
 i_item_id
 ,i_item_desc
 ,s_store_id
 ,s_store_name
 ,stdev(ss_net_profit) as store_sales_profit
 ,stdev(sr_net_loss) as store_returns_loss
 ,stdev(cs_net_profit) as catalog_sales_profit
 from
 store_sales
 ,store_returns
 ,catalog_sales
 ,date_dim d1
 ,date_dim d2
 ,date_dim d3
 ,store
 ,item
 where
 d1.d_moy = 7
 and d1.d_year = 1998
 and d1.d_date_sk = ss_sold_date_sk
 and i_item_sk = ss_item_sk
 and s_store_sk = ss_store_sk
 and ss_customer_sk = sr_customer_sk
 and ss_item_sk = sr_item_sk
 and ss_ticket_number = sr_ticket_number
 and sr_returned_date_sk = d2.d_date_sk
 and d2.d_moy               between 7 and  7 + 2
 and d2.d_year              = 1998
 and sr_customer_sk = cs_bill_customer_sk
 and sr_item_sk = cs_item_sk
 and cs_sold_date_sk = d3.d_date_sk
 and d3.d_moy               between 7 and  7 + 2
 and d3.d_year              = 1998
 group by
 i_item_id
 ,i_item_desc
 ,s_store_id
 ,s_store_name
 order by
 i_item_id
 ,i_item_desc
 ,s_store_id
 ,s_store_name
 ;