Dividing 2 numbers returns 0

Question

I\'m trying to divide 2 counts in order to return a percentage.

The following query is returning 0:

select (
    (select COUNT(*) from sax         


        

Answer 1

It can be done more succinctly by moving the common condition to the where clause:

select sum(case when endOfUse is null then 1 end) * 100.0 / count(*) percentage
from saxref..AuthCycle
where addDate >= '1/1/2014'

Note how you don't need the case of 0 for false either, since nulls are ignored with sum()