"masterdineen" <(E-Mail Removed)> wrote:
> I have the following equation =AVERAGEIF(SUPPORT!K9:K99, ">0")
> support!K9:K99 being number of daydiff.
> I want to select the daydiff values based on another date column,
> that only has the current month and year. ie Aug(8) & 2012
=AVERAGEIFS(support!K9:K99,support!K9:K99,">0",
support!D9

99,">="&DATE(2012,8,1),support!D9

99,"<="&DATE(2012,8,31))
And in case there might be no qualifying cells:
=IFERROR(AVERAGEIFS(support!K9:K99,support!K9:K99,">0",
support!D9

99,">="&DATE(2012,8,1),support!D9

99,"<="&DATE(2012,8,31)),0)