with year_total as (select c_customer_id                                customer_id
                         , c_first_name                                 customer_first_name
                         , c_last_name                                  customer_last_name
                         , c_preferred_cust_flag                        customer_preferred_cust_flag
                         , c_birth_country                              customer_birth_country
                         , c_login                                      customer_login
                         , c_email_address                              customer_email_address
                         , d_year                                       dyear
                         , sum(ss_ext_list_price - ss_ext_discount_amt) year_total
                         , 's'                                          sale_type
                    from customer
                       , store_sales
                       , date_dim
                    where c_customer_sk = ss_customer_sk
                      and ss_sold_date_sk = d_date_sk
                    group by c_customer_id
                           , c_first_name
                           , c_last_name
                           , c_preferred_cust_flag
                           , c_birth_country
                           , c_login
                           , c_email_address
                           , d_year
                    union all
                    select c_customer_id                                customer_id
                         , c_first_name                                 customer_first_name
                         , c_last_name                                  customer_last_name
                         , c_preferred_cust_flag                        customer_preferred_cust_flag
                         , c_birth_country                              customer_birth_country
                         , c_login                                      customer_login
                         , c_email_address                              customer_email_address
                         , d_year                                       dyear
                         , sum(ws_ext_list_price - ws_ext_discount_amt) year_total
                         , 'w'                                          sale_type
                    from customer
                       , web_sales
                       , date_dim
                    where c_customer_sk = ws_bill_customer_sk
                      and ws_sold_date_sk = d_date_sk
                    group by c_customer_id
                           , c_first_name
                           , c_last_name
                           , c_preferred_cust_flag
                           , c_birth_country
                           , c_login
                           , c_email_address
                           , d_year)
select t_s_secyear.customer_id
     , t_s_secyear.customer_first_name
     , t_s_secyear.customer_last_name
     , t_s_secyear.customer_preferred_cust_flag
from year_total t_s_firstyear
   , year_total t_s_secyear
   , year_total t_w_firstyear
   , year_total t_w_secyear
where t_s_secyear.customer_id = t_s_firstyear.customer_id
  and t_s_firstyear.customer_id = t_w_secyear.customer_id
  and t_s_firstyear.customer_id = t_w_firstyear.customer_id
  and t_s_firstyear.sale_type = 's'
  and t_w_firstyear.sale_type = 'w'
  and t_s_secyear.sale_type = 's'
  and t_w_secyear.sale_type = 'w'
  and t_s_firstyear.dyear = 2001
  and t_s_secyear.dyear = 2001 + 1
  and t_w_firstyear.dyear = 2001
  and t_w_secyear.dyear = 2001 + 1
  and t_s_firstyear.year_total > 0
  and t_w_firstyear.year_total > 0
  and case when t_w_firstyear.year_total > 0 then t_w_secyear.year_total / t_w_firstyear.year_total else 0.0 end
    > case when t_s_firstyear.year_total > 0 then t_s_secyear.year_total / t_s_firstyear.year_total else 0.0 end
order by t_s_secyear.customer_id
       , t_s_secyear.customer_first_name
       , t_s_secyear.customer_last_name
       , t_s_secyear.customer_preferred_cust_flag limit 100
