Q&A for those using, extending or developing Emacs
select datepart(year, P.CreationDate) + convert(float,datepart(month, P.CreationDate))/100 monthYear, count(*) n from Posts P join PostTags PT on P.Id = PT.PostId join Tags T on PT.TagId = T.Id where T.TagName = 'wpf' group by datepart(year, P.CreationDate) + convert(float,datepart(month, P.CreationDate))/100 select datepart(year, P.CreationDate) + convert(float,datepart(month, P.CreationDate))/100 monthYear, count(*) n from Posts P join PostTags PT on P.Id = PT.PostId join Tags T on PT.TagId = T.Id where T.TagName = 'wcf' group by datepart(year, P.CreationDate) + convert(float,datepart(month, P.CreationDate))/100