| SELECT |
| channel, |
| col_name, |
| d_year, |
| d_qoy, |
| i_category, |
| COUNT(*) sales_cnt, |
| SUM(ext_sales_price) sales_amt |
| FROM ( |
| SELECT |
| 'store' AS channel, |
| ss_store_sk col_name, |
| d_year, |
| d_qoy, |
| i_category, |
| ss_ext_sales_price ext_sales_price |
| FROM store_sales, item, date_dim |
| WHERE ss_store_sk IS NULL |
| AND ss_sold_date_sk = d_date_sk |
| AND ss_item_sk = i_item_sk |
| UNION ALL |
| SELECT |
| 'web' AS channel, |
| ws_ship_customer_sk col_name, |
| d_year, |
| d_qoy, |
| i_category, |
| ws_ext_sales_price ext_sales_price |
| FROM web_sales, item, date_dim |
| WHERE ws_ship_customer_sk IS NULL |
| AND ws_sold_date_sk = d_date_sk |
| AND ws_item_sk = i_item_sk |
| UNION ALL |
| SELECT |
| 'catalog' AS channel, |
| cs_ship_addr_sk col_name, |
| d_year, |
| d_qoy, |
| i_category, |
| cs_ext_sales_price ext_sales_price |
| FROM catalog_sales, item, date_dim |
| WHERE cs_ship_addr_sk IS NULL |
| AND cs_sold_date_sk = d_date_sk |
| AND cs_item_sk = i_item_sk) foo |
| GROUP BY channel, col_name, d_year, d_qoy, i_category |
| ORDER BY channel, col_name, d_year, d_qoy, i_category |
| LIMIT 100 |