calculating months registered
I have a database of student data. One of the fields is the date on which the student registered for their degree programme. I would really like is for Filemaker to do a calculation for me showing how many months have passed since that registration date and automatically update a 'months registered' field.
At the moment I have a really contrived workaround, but it would be fantastic if there was an elegant way of doing this that doesn't require manual input from me every month.
I'm on Filemaker 9 if that makes any difference.
I really appreciate your help -- thanks in advance.