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

SELECT
   unnest(array['Sl.no', 'username', 'Designation','salary']) AS "Columns",
   unnest(array[Sl.no, username, value3Count,salary]) AS "Values"
FROM view_name
ORDER BY "Columns"

Reference : convertingColumnsToRows