DECLARE

 birthdate1 DATE := TO_DATE('29-SEP-70', 'DD-MON-YY');

BEGIN

 DECLARE

 birthdate DATE := TO_DATE('29-SEP-70', 'DD-MON-YY');

 BEGIN

 IF birthdate = birthdate1 THEN

 DBMS_OUTPUT.PUT_LINE ('Same Birthday');

 ELSE

 DBMS_OUTPUT.PUT_LINE ('Different Birthday');

 END IF;

 END;

END;

/