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Q&A for active researchers, academics and students of physics

select [Month], 
       sum(case when  tags like '%popular-science%' then 1 else 0 end) Popsci,
       sum(case when  tags like '%everyday-life%' then 1 else 0 end) Everydaylife,
              sum(case when  tags like '%home-experiment%' then 1 else 0 end) HomeExp
from
(
  select CAST(
      cast(DATEPART(YYYY, CreationDate) as varchar) + '-' + cast(DATEPART(MM, CreationDate) as varchar) + '-01'
    as datetime) [Month], 
    PostTypeId,Tags
     
  from Posts p
) as X
group by [Month]
order by [Month] asc

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edited aug 5 13

created aug 5 13 Manishearth