Question

I have a query that should order the result in asc or desc depending upon a column value.

e.g.

if employee of type manager exists THEN order by joining_date, bith_date ASC
else if employee is developer THEN order by joining_date, birth_date DESC.

I would like to achieve something like below, but can’t achieve that.

ORDER BY CASE WHEN employee_type = 'm'  
              THEN joining_date, birth_date ASC;
              WHEN employee_type = 'd' 
              THEN joining_date, birth_date  DESC; 

Answer 1

Well I got the answer after some research.

We can add multiple columns in where clause conditionally as follows :

ORDER BY DECODE(employee_type, 'm', joining_date, birth_date, salary) ASC,
         DECODE(employee_type, 'd', joining_date, birth_date, salary) DESC

This will order the result on the basis of employee_type.