The Spirit Of The Age

The following SQL can be used to detemine an Employee's current age based on their birthdate.

select PER.EMPLID,
       PER.BIRTHDATE,
       case
         when TO_CHAR(PER.BIRTHDATE,'MMDD') <= TO_CHAR(SYSDATE,'MMDD')
          then TO_NUMBER(TO_CHAR(SYSDATE,'YYYY')) - TO_NUMBER(TO_CHAR(PER.BIRTHDATE,'YYYY'))
          else TO_NUMBER(TO_CHAR(SYSDATE,'YYYY')) - TO_NUMBER(TO_CHAR(PER.BIRTHDATE,'YYYY')) - 1
       end as AGE
  from PS_PERSONAL_DATA PER

Feel free to replace SYSDATE with whatever date you want to calculate the ages at. That's the spirit of the age...