Using WHERE clause with BETWEEN and null date parameters

Question

One of my WHERE clauses is the following:

AND (DateCreated BETWEEN @DateFrom and @DateTo OR (@DateFrom IS NULL OR @DateTo IS NULL))

Answer 1

This can simply be done by using ISNULL function.

DateCreated BETWEEN ISNULL(@DateFrom,DateCreated) AND ISNULL(@DateTo,DateCreated)