counting empty fields
I'm finally switching from my Appleworks to Filemaker pro. I have a database of my photographic collection. As part of the database I have a field that indicates the value of each item in my collection. To make sure I have not accidently missed a value entry I have a summary field that checks all of the value fields and tells me how many are empty. In Appleworks I used the Count2 function. This function evaluated each value field and counted how many were empty by comparing each field to zero. So far as I can tell the Count function in Filemaker only lets me compare one field with another field rather than a string or numeric value. How do I go about counting empty fields?