Is Null Greater Than Any Date Data Type?

Question

I have this query in DB2

SELECT * FROM SOMESCHEMA.SOMETABLE WHERE SYSDATE > @A

If the SYSDATE is NULL, would it be

Answer 1

You can use this solution for comparing of two nullable dates (P.EndDate,C.EndDate):

[MinDate] =
        CASE
            WHEN
                ISNULL(C.EndDate,P.EndDate) <= ISNULL(P.EndDate,C.EndDate) 
            THEN
                ISNULL(C.EndDate,P.EndDate)
            ELSE
                ISNULL(P.EndDate,C.EndDate)
        END