Possible Answers

1. select distinct salary from 
   employee_data order by salary DESC;
       
   +--------+
   | salary |
   +--------+
   | 200000 |
   | 120000 |
   | 110000 |
   | 100000 |
   |  90000 |
   |  85000 |
   |  80000 |
   |  75000 |
   |  72000 |
   |  70000 |
   +--------+
   10 rows in set (0.01 sec)
   
   

2. mysql> select distinct f_name from employee_data;
   
   +---------+
   | f_name  |
   +---------+
   | Alok    |
   | Anamika |
   | Arthur  |
   | Danny   |
   | Edward  |
   | Fred    |
   | Ganesh  |
   | Hal     |
   | Hassan  |
   | John    |
   | Joseph  |
   | Kim     |
   | Manish  |
   | Mary    |
   | Mike    |
   | Monica  |
   | Paul    |
   | Peter   |
   | Roger   |
   | Shahida |
   +---------+
   20 rows in set (0.00 sec)