PL/SQL :: Query To Total Attendance By Months

I need the following totals for each student based on the schools that they are enrolled for each month July through June.

Total Days Suspended from each school

Attendance Table Columns - Absent Date, Absent Code, Pupil_Number, School (Absent Codes for suspended = 3)

Total Days Present at each school - Days Enrolled at each school minus Days Suspended minus Absences

Totals Takes the first day that a student is enrolled (counts the days that the school is in session and the student is not marked absent) Student must be enrolled during the time frame for that month.

Total Days Absent - Total days absent minus suspensions

Examples
Student enrolls in school 11111 on 7/15/2011
Student withdraws from School 11111 on 11/15/2011
Student enrolls in school 22222 on 11/20/2011

Total Days Present should be totaled for each student for each month that they are in a school.

I need 1 row of data for the above student for each month that contains total days suspended, total days present and total days absent.
Pupil Number School Month Totals Days Suspended Total Days Absent Total Days Present

1234 11111 07 0 0 0
1234 11111 08 0 0 4 (school days 4)
1234 11111 09 3 1 16 (schools days 20 - 3-1)
1234 11111 10 0 1 18 (school days 19 - 1)
1234 11111 11 1 1 7 (student enrolled at school A 9 days -1-1)
1234 22222 11 0 1 10 (student enrolled at school B 11 days -1)
1234 22222 12 1 2 17 (school B 20-1-2)
1234 22222 01 0 0 20