How to check for Null values in set expression

[#1]

Hi,

I have to count ext_id for those having Segment as null.

So in expression I wrote count({< Isnull(Segment)>} ext_id)

but it's not working.

Regards,

Tanay

[sunny_talwar]

I don't think this will work because Null Segments cannot be selected using this logic because the Segment is null

Segment -= {" * "}

[vishsaggi]

Oh ok. Got it. Thanks for clarification.