Modifying the query

Question

The relational model for the database is:
Department(DeptNum, Descrip, Instname, DeptName, State, Postcode)
Academic(AcNum, DeptNum, FamName, GiveName, Initials, Title)
Paper(PaNum, Title)
Author(PaNum, AcNum)
Field(FieldNum, ID, Title)
Interest(FieldNum, AcNum, Descrip)
What are the number of academics who have written more than the overall average number of
papers per academic.
The average number of papers per academic is the total number of papers
divided by the total number of academics
I do know how to get the list of the academics who have written more than the average number of papers but adding all the academics in the list is what I want to do.
My query
select au.acnum,count(*) as papers
from author au,paper p,academic a
group by au.acnum
having count(*)>(count(p.panum)/count(a.acnum))

Answer 1

See if this will hlep you.
select aut.acnum
,     count(*) as papers
from department dep
,     academic aca
,     author aut
,     paper pap
where dep.deptnum = aca.deptnum
and aca.acnum = aut.acnum
and aut.panum = pap.panum
group aut.acnum
having count(*)>(count(pap.panum)/count(aca.acnum))
Lrovedo..