You would use Is Null and Is Not Null in query expressions and SQL WHERE clauses. IsNull(), on the other hand, is a Visual Basic for Applications (VBA) function and would be used only in VBA modules.

So I have a program in Python for use on a Linux machine that's dealing with binary data flowing through what may be a Linux FIFO.<BR><BR>I'm using Avinash Kak's BitVector to modify the data as it ...