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WITH TopTags AS
(SELECT PostTags.TagId as TagId, Count(PostTags.PostId) AS [Number of Posts]
FROM PostTags INNER JOIN (SELECT * FROM Tags WHERE TagName = ##TagName:string##) as A on PostTags.TagId = A.Id
     GROUP BY TagId),
     
     X AS
     (SELECT PostTags.TagId as Id_Tag, PostTags.PostId as Id_Post, OwnerUserId, YEAR(UserPosts.CreationDate) as CreationYear, ViewCount
     FROM 
     PostTags INNER JOIN
     (SELECT Posts.Id, PostTypeId, Posts.CreationDate, OwnerUserId, Tags, ViewCount
     FROM Posts INNER JOIN Users on Posts.OwnerUserId = Users.Id) as UserPosts 
     on PostTags.PostId = UserPosts.Id) 

SELECT CreationYear, [Post Count], COUNT(OwnerUserId) AS [Number of Users], SUM(NumberViews) as [Number of Views] FROM (SELECT CreationYear, OwnerUserId, SUM(ViewCount) as [NumberViews], COUNT(DISTINCT Id_Post) as [Post Count]
FROM 
     TopTags
     INNER JOIN
     X
     on X.Id_tag = TopTags.TagId
GROUP BY CreationYear, OwnerUserId) as Y
GROUP BY CreationYear, [Post Count];

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edited jan 26

created jan 26 jon.doe41074