select cc_call_center_id Call_Center,
       cc_name           Call_Center_Name,
       cc_manager        Manager,
       sum(cr_net_loss)  Returns_Loss
from call_center,
     catalog_returns,
     date_dim,
     customer,
     customer_address,
     customer_demographics,
     household_demographics
where cr_call_center_sk = cc_call_center_sk
  and cr_returned_date_sk = d_date_sk
  and cr_returning_customer_sk = c_customer_sk
  and cd_demo_sk = c_current_cdemo_sk
  and hd_demo_sk = c_current_hdemo_sk
  and ca_address_sk = c_current_addr_sk
  and d_year = 1998
  and d_moy = 11
  and ((cd_marital_status = 'M' and cd_education_status = 'Unknown')
    or (cd_marital_status = 'W' and cd_education_status = 'Advanced Degree'))
  and hd_buy_potential like 'Unknown%'
  and ca_gmt_offset = -7
group by cc_call_center_id, cc_name, cc_manager, cd_marital_status, cd_education_status
order by sum(cr_net_loss) desc
