Counts Help

[jbullydawg]

Good afternoon,

This might be pretty straightforward but it is causing me problems.

I have a table of student registrations that pulls students in from the Student table. One student can have multiple registrations in one Session and Year in the Registrations table.

I need to be able to count only those students with less than 4 registrations.

For example:

John Doe has three registration records for Summer 1 2007.

Jane Doe has five registration records for Summer 1 2007.

According to this example, I would need to be able to see that only 1 student is registered for less than 4 classes on a report.

Any ideas?

Edited May 22, 2007 by Guest

[bcooney]

how about a flag calc in Students, that equals "1" if count (Student::Registrations StudentID) is less than 5.

[jbullydawg]

That might work but I'm looking for those students with less than 4 registration records in a user-specified Session and Year.

John Doe might have 3 registration records in Summer 1 2007 but will registration records in many other Sessions and years as well. How do I identify those with less than 4 records in a given Session and year?

[bcooney]

Well, you may need a separate flag field in Students for each session and year, each with a separate relationship from Student::Registration by the StudentID, SessionID, Year. In Students, make global calc fields that store the Session ID and Year that you'll use in the relationship.

So, in Students, you would have:

flag_Session1Year2007 = if (count ( students::registration by Sess1Yr07)<4, 1, 0)