NULL usage in crystal reports formula/query


I am using the version of Crystal reports that comes with VS 2005.

I have simple report that I whish to extract information out of the database with.
All works well except where the value of one of the criteria fields is NULL.

My Record selection formula looks something like this
{UpdIND} <> "D" and
{Code} = {?p_Code} and
(({Feld1} < {?Tmp} ) OR {isnull("Field1})))

Basically I want the data where field1 is less than the required value or field1 is null.

When I try to use the "Field1 IS NULL" syntax, crystal rejects it as if the "IS NULL" portion should not be there.
What is the correct way to do this?

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tcssAuthor Commented:

Reference from

Th null part of the expression must come first.
Strange but it worked.

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Microsoft SQL Server 2005

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