How to calling this procedure : 
* CREATE OR REPLACE PROCEDURE GET_SINGLE_CUSTOMERINFO(
  P_ID IN NUMBER,
  P_AGE OUT NUMBER,
  P_OCCUPATION OUT VARCHAR2,
  P_LASTSTATEMENT OUT VARCHAR2)
  AS
  BEGIN
  SELECT AGE,OCCUPATION,LASTSTATEMENT INTO P_AGE,P_OCCUPATION,P_LASTSTATEMENT
  FROM crossallcustomers
  WHERE crossallcustomers.id=P_ID;
  END;
  *

   

 