| # Task: 008 |
|
|
| **Database:** retails |
|
|
| ## Question |
| Identify the manufacturer that contributed the highest profit during the last quarter of 1994. Show the manufacturer and the profit. |
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|
|
| ## Gold Query |
|
|
| ```sql |
| WITH manufacturer_profit AS ( |
| SELECT p.p_mfgr, |
| SUM(l.l_extendedprice * (1 - l.l_discount) - ps.ps_supplycost * l.l_quantity) AS profit |
| FROM lineitem l |
| JOIN part p ON l.l_partkey = p.p_partkey |
| JOIN partsupp ps ON l.l_partkey = ps.ps_partkey AND l.l_suppkey = ps.ps_suppkey |
| WHERE l.l_commitdate >= '1994-10-01' |
| AND l.l_commitdate < '1995-01-01' |
| AND l.l_returnflag <> 'R' |
| GROUP BY p.p_mfgr |
| ) |
| SELECT p_mfgr, profit |
| FROM manufacturer_profit |
| WHERE profit = (SELECT MAX(profit) FROM manufacturer_profit); |
| ``` |
|
|
| **Execution Result:** |
|
|
| | p_mfgr | profit | |
| |----------------|---------------| |
| | Manufacturer#2 | 5.4341928e+08 | |
| |
| *1 rows* |
