How many questions per month does each tag in the top 10 tags get
Q&A about the site for music historians, critics, and fans
select *, count(*) from ( select CAST( cast(DATEPART(YYYY, CreationDate) as varchar) + '-' + cast(DATEPART(MM, CreationDate) as varchar) + '-01' as date) Month, t.TagName from Posts p join PostTags pt on pt.PostId = p.Id join Tags t on t.Id = pt.TagId where t.TagName in ('java','ruby','javascript','c','c++') ) as X where month between cast('2010-01-01' as date) and cast('2012-02-01' as date) group by TagName, Month order by Month asc, count(*) desc