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"
, "t_s_secyear"."customer_birth_country"
, "t_s_secyear"."customer_login"
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 DECIMAL '0.0' END) > (CASE WHEN ("t_s_firstyear"."year_total" > 0) THEN ("t_s_secyear"."year_total" / "t_s_firstyear"."year_total") ELSE DECIMAL '0.0' END))
ORDER BY "t_s_secyear"."customer_id" ASC, "t_s_secyear"."customer_first_name" ASC, "t_s_secyear"."customer_last_name" ASC, "t_s_secyear"."customer_preferred_cust_flag" ASC
LIMIT 100
;