How Can I Make Oracle Query Sort Order Dynamic?

Question

I have a Oracle procedure inside a package like this

PROCEDURE getEmployee
(
  pinLanguage               IN    VARCHAR2,
  pinPage                   IN    NUMBER         


        

Answer 1

You can avoid all these duplicated cases. Multiply row number by -1 when descending order is required:

order by 
    case pinSortOrder when 'desc' then -1 else 1 end * 
    row_number() over (
      order by case pinSortColumn when 'FullName'    then full_name     end, 
               case pinSortColumn when 'Gender'      then gender        end, 
               case pinSortColumn when 'DateOfBirth' then date_of_birth end)  

^{dbfiddle demo}

Also this way you do not have to convert data the same type, no need to use to_char.