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Plot the site activity by voting, questions, answers and comments, aggregated per week.

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with VoteNames as (
   select pt.Id as PostTypeId,
          vt.Id as VoteTypeId,
          case when pt.Id in (1, 2) and vt.Id = 1 then 'AnswerAccept'
               when pt.Id = 1 and vt.Id != 1 then 'QuestionVote'
               when pt.Id = 2 and vt.Id != 1 then 'AnswerVote'
               else 'Unknown'
       end as VName
   from VoteTypes vt,
        PostTypes pt
   where vt.Id in (1, 2, 3)
     and pt.Id in (1, 2)

) , Activity as (

    select DATEADD(DAY, 7 - DATEPART(WEEKDAY, CONVERT(DATE,u.CreationDate)), CONVERT(DATE,u.CreationDate)) as YearMon,
           'NewUser' as Series,
           count(*) as Action
    from Users u
    group by DATEADD(DAY, 7 - DATEPART(WEEKDAY, CONVERT(DATE,u.CreationDate)), CONVERT(DATE,u.CreationDate))

  UNION
  
    select DATEADD(DAY, 7 - DATEPART(WEEKDAY, v.CreationDate), v.CreationDate) as YearMon,
       VName as Series,
       count(*) as Action
    from Posts p,
         Votes v,
         VoteNames as vn
    where p.Id = v.PostId
      and v.VoteTypeId in (1, 2, 3)
      and p.PostTypeId in (1, 2)
      and v.VoteTypeId = vn.VoteTypeId
      and p.PostTypeId = vn.PostTypeId
    group by DATEADD(DAY, 7 - DATEPART(WEEKDAY, v.CreationDate), v.CreationDate),
          VName
  
  UNION
  
    select DATEADD(DAY, 7 - DATEPART(WEEKDAY, CONVERT(DATE,p.CreationDate)), Convert(DATE, p.CreationDate)) as YearMon,
       pt.Name as Series,
       count(*) as Action
    from Posts p, PostTypes pt
    where p.PostTypeId in (1, 2)
      and p.PostTypeId = pt.Id
    Group by DATEADD(DAY, 7 - DATEPART(WEEKDAY, CONVERT(DATE,p.CreationDate)), Convert(DATE, p.CreationDate)),
          pt.Name
  
  UNION
    
    SELECT DATEADD(DAY, 7 - DATEPART(WEEKDAY, CONVERT(DATE,c.CreationDate)), Convert(DATE, c.CreationDate)) as YearMon,
        'Comment' as Series,
        count(*) as Action
    from Comments c
    Group by DATEADD(DAY, 7 - DATEPART(WEEKDAY, CONVERT(DATE,c.CreationDate)), Convert(DATE, c.CreationDate))
)
select *
from Activity
pivot (
    sum(Action)
    for Series in ([Question],[AnswerAccept],[Answer],[Comment],[QuestionVote],[AnswerVote],[NewUser]))
    as Pivoted
where YearMon >= DATEADD(WEEK, - ##Weeks:int?60## , CURRENT_TIMESTAMP) -- previous 60 weeks.
  and YearMon < CURRENT_TIMESTAMP -- ignore most recent week.
order by YearMon

view current version

edited feb 2 14

created jan 21 14 rolfl