starting problem with stored procedure in ibm db2

[sushmidb2]

I am a newbie of ibm db2 user.

My code snippet goes as below:

CREATE PROCEDURE DBINST1.GET_WORKING_DAYS
(IN EMPNUM DECIMAL, IN SALMONTH DECIMAL)
LANGUAGE SQL
BEGIN

DECLARE STARTDATE DECIMAL(9,2);

SELECT MIN(ATTENDANCEDATE) INTO STARTDATE FROM ATTENDANCETTABLE
WHERE EMPNO = EMPNUM AND SALARYMONTH = SALMONTH;

END

This code snippet is not working.
Please help me out.