Sample table

The following is a sample sales_tbl table:

SELECT city, state, region, quarter, amt, profit_margin FROM sales_tbl 
ORDER BY city,state, region;
 CITY        | STATE |  REGION   | QUARTER | AMT  | PROFIT_MARGIN 
-------------+-------+-----------+---------+------+--------------- 
 Atlanta     | GA    | Central   |       4 | 1700 |   16
 Atlanta     | GA    | Central   |       2 | 1500 |   12
 Atlanta     | GA    | Central   |       3 | 1600 |   15
 Atlanta     | GA    | Central   |       1 | 1500 |   12
 Baltimore   | MD    | Central   |       2 | 2500 |   21
 Baltimore   | MD    | Central   |       3 | 2000 |   22
 Baltimore   | MD    | Central   |       4 | 2500 |   19
 Baltimore   | MD    | Central   |       1 | 2000 |   12
 Boston      | MA    | Northeast |       1 | 2000 |   10
 Boston      | MA    | Northeast |       2 | 1500 |   20
 Boston      | MA    | Northeast |       3 | 1700 |   21
 Boston      | MA    | Northeast |       4 | 2400 |   20
 Los Angeles | CA    | Southwest |       4 | 5300 |   22
 Los Angeles | CA    | Southwest |       2 | 3000 |   15
 Los Angeles | CA    | Southwest |       3 | 3500 |   17
 Los Angeles | CA    | Southwest |       1 | 3000 |   15
 New York    | NY    | Northeast |       4 | 5000 |   20
 New York    | NY    | Northeast |       1 | 3000 |   8
 New York    | NY    | Northeast |       3 | 4300 |   22
 New York    | NY    | Northeast |       2 | 3700 |   20
 Seattle     | WA    | Northwest |       2 | 2200 |   15
 Seattle     | WA    | Northwest |       4 | 2300 |   17
 Seattle     | WA    | Northwest |       3 | 2200 |   18
 Seattle     | WA    | Northwest |       1 | 2000 |   15
(24 rows)