PostgreSQL convert columns to rows? Transpose?

Question

I have a PostgreSQL function (or table) which gives me the following output:

Sl.no    username    Designation    salary   etc..
 1        A           XYZ             


        

Answer 1

There is no proper way to do this in plain SQL or PL/pgSQL.

It will be way better to do this in the application, that gets the data from the DB.