Shetty,
FIrst, a Declared temporary table is only available as long as the session is active or the table is not dropped explicitly. There really is no such thing as a created temporary table, at least physically, in DB2. Any table that is Created will be available until it is dropped. Now, you can "create" a table to be used as a temporary table for whatever purpose you deem necessary, just remember that it is your responsibility to clean up after yourself.
HTH
Andy