| # Task: 022 |
|
|
| **Database:** retails |
|
|
| ## Question |
| Show the customer with the highest account balance for each area. |
|
|
|
|
| ## Gold Query |
|
|
| ```sql |
| SELECT c_mktsegment, c_custkey, c_name, c_acctbal |
| FROM ( |
| SELECT c.c_mktsegment, |
| c.c_custkey, |
| c.c_name, |
| c.c_acctbal, |
| RANK() OVER (PARTITION BY c.c_mktsegment ORDER BY c.c_acctbal DESC) AS rn |
| FROM customer c |
| ) t |
| WHERE rn = 1; |
| ``` |
|
|
| **Execution Result:** |
|
|
| | c_mktsegment | c_custkey | c_name | c_acctbal | |
| |----------------|-------------|--------------------|-------------| |
| | AUTOMOBILE | 21734 | Customer#000021734 | 9998.72 | |
| | BUILDING | 330 | Customer#000000330 | 9999.59 | |
| | FURNITURE | 72823 | Customer#000072823 | 9999.65 | |
| | HOUSEHOLD | 48616 | Customer#000048616 | 9999.84 | |
| | MACHINERY | 14740 | Customer#000014740 | 9999.96 | |
|
|
| *5 rows* |
