Count - autonumber - some conditions

Count - autonumber - some conditions

Hi,
I have a view in which I list all class of some universities.
So I have fields as, University (U), Matter (M), Teacher (T), Year (Y)... It´s possible to generate a complex autonumber machine for each value as 1, 2, 3, 4 for each UMTY condition in the view (I have 5 Universities, 100 matters, 150 teacher and 3 academic years (so I need 150 autonumber machine for each year)?... Sometimes my tutors forget the sequencies! So I need to get free them from this function!
Normally I use this function
aa = count(Lesson[ID != 0]);
Thanks to anyone have a suggestion.

Mic