| SELECT count(*) |
| FROM ( |
| SELECT DISTINCT |
| c_last_name, |
| c_first_name, |
| d_date |
| FROM store_sales, date_dim, customer |
| WHERE store_sales.ss_sold_date_sk = date_dim.d_date_sk |
| AND store_sales.ss_customer_sk = customer.c_customer_sk |
| AND d_month_seq BETWEEN 1200 AND 1200 + 11 |
| INTERSECT |
| SELECT DISTINCT |
| c_last_name, |
| c_first_name, |
| d_date |
| FROM catalog_sales, date_dim, customer |
| WHERE catalog_sales.cs_sold_date_sk = date_dim.d_date_sk |
| AND catalog_sales.cs_bill_customer_sk = customer.c_customer_sk |
| AND d_month_seq BETWEEN 1200 AND 1200 + 11 |
| INTERSECT |
| SELECT DISTINCT |
| c_last_name, |
| c_first_name, |
| d_date |
| FROM web_sales, date_dim, customer |
| WHERE web_sales.ws_sold_date_sk = date_dim.d_date_sk |
| AND web_sales.ws_bill_customer_sk = customer.c_customer_sk |
| AND d_month_seq BETWEEN 1200 AND 1200 + 11 |
| ) hot_cust |
| --LIMIT 100 |