Certlog.nsf view filter out inactive names

Hi, I would like to filter out inactive employees using names.nsf for any of the view in the Certlog.nsf. Not sure how I need to go about doing that. Any ideas. Here is what I have so far

SELECT @IsUnavailable(Type) | Type=“Certified User” & ExpirationDate > @Date(2010;8;1).

Thanks in advance.

Davis