Complementary R tags in 2016

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select DATEADD(YEAR, DATEDIFF(YEAR,0,creationDate), 0) as creation_year, TagName, count(TagName) as num_tags
from PostTags
inner join (
  select PostId
  from PostTags
  where TagId = (select id from Tags where TagName = 'python')
  ) p
on PostTags.PostId = p.PostId
inner join (
  select Id, creationDate
  from Posts
  inner join (
    select PostId
    from PostTags
    where TagId = (select id from Tags where TagName = 'python')
 ) p2
 on Posts.id = p2.PostId
) p3
on PostTags.PostId = p3.Id
inner join Tags
on PostTags.TagId = Tags.Id
group by DATEADD(YEAR, DATEDIFF(YEAR,0,creationDate), 0), TagName
having TagName != 'python' --- remove 'python' tags
order by num_tags desc

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