Use 3 times in 7 days

[lesterd]

How do I write a calculation that will tell me if a person with a unique ID has signed up to use a facility more than three times in a 7 day period?

Thanks

Lester

[Søren Dyhr]

Tounge in cheek, by using count! Since the bookings belongs to a join table/file a relation away, and each day ought to be it's own record!

--sd