Calculating Average on columns with zeros.

I'm trying to work out an average field on a report that i'm writing and having the problem described below.

e.g. if you had 3 weeks of cash which were 0, 2, 4 then a normal average
would be ((0+2+4)/3) = 2 but the average that I want is (2+4)/2 = 3.

Now I can do this in SQL by using AVG(cash) with a WHERE cash>0. But the
trouble comes when all cash values are zero for all all columns on the report.

e.g. if I had

      wk1 wk2 wk3
rowA 0 2 4
rowB 0 0 0
rowC 1 0 0

I am using

SELECT name, SUM(cash), AVG(cash) from TABLE where cash>0;

And I get
rowA, 6, 3
rowC, 1, 1

This is correct for those rows but I want a result for rowB that has

rowB, 0, 0

Can anyone help with this. Received on Thu Aug 05 2004 - 03:49:24 CDT