| # Task: 025 |
|
|
| **Database:** retails |
|
|
| ## Question |
| For each manufacturer, find top N products with highest revenue from sales in America. Return the manufacturer, product, and revenue. |
|
|
|
|
| ## Gold Query |
|
|
| ```sql |
| WITH america_revenue AS ( |
| SELECT |
| p.p_mfgr, |
| p.p_partkey, |
| p.p_name, |
| SUM(l.l_extendedprice) AS revenue, |
| RANK() OVER (PARTITION BY p.p_mfgr ORDER BY SUM(l.l_extendedprice) DESC) AS rn |
| FROM lineitem l |
| JOIN part p ON l.l_partkey = p.p_partkey |
| JOIN orders o ON l.l_orderkey = o.o_orderkey |
| JOIN customer c ON o.o_custkey = c.c_custkey |
| JOIN nation n ON c.c_nationkey = n.n_nationkey |
| WHERE n.n_name = 'UNITED STATES' |
| GROUP BY p.p_mfgr, p.p_partkey, p.p_name |
| ) |
| SELECT p_mfgr, p_partkey, p_name, revenue |
| FROM america_revenue |
| WHERE rn <= :top_n |
| ORDER BY p_mfgr, revenue DESC; |
| ``` |
|
|
| **Execution Result:** |
|
|
| | p_mfgr | p_partkey | p_name | revenue | |
| |----------------|-------------|-----------------------------------------|-----------| |
| | Manufacturer#1 | 192229 | beige mint lavender light mint | 350123.3 | |
| | Manufacturer#1 | 37637 | powder papaya azure blush gainsboro | 341694.71 | |
| | Manufacturer#1 | 199745 | azure black firebrick green rosy | 332053.2 | |
| | Manufacturer#2 | 108984 | linen chocolate sky misty linen | 370694.28 | |
| | Manufacturer#2 | 896 | ivory thistle wheat lavender bisque | 345002.88 | |
| | Manufacturer#2 | 178779 | pale peach cream orchid pale | 334398.6 | |
| | Manufacturer#3 | 62925 | azure puff navy olive sky | 402126.96 | |
| | Manufacturer#3 | 192905 | honeydew orchid dodger floral royal | 385594.7 | |
| | Manufacturer#3 | 151855 | wheat goldenrod ghost floral brown | 364208.35 | |
| | Manufacturer#4 | 76992 | slate medium powder antique goldenrod | 354418.2 | |
| | Manufacturer#4 | 185839 | powder ghost sienna magenta wheat | 338770.08 | |
| | Manufacturer#4 | 186960 | lemon blanched turquoise blush brown | 335701.44 | |
| | Manufacturer#5 | 97943 | burnished lawn tomato magenta turquoise | 399833.64 | |
| | Manufacturer#5 | 150952 | slate tomato bisque linen orange | 372548.7 | |
| | Manufacturer#5 | 169945 | antique thistle salmon steel indian | 354629.44 | |
| |
| *15 rows* |
