Q&A for programmers
select t2.TagName, count(p2.PostId) from PostTags p1 join Tags t1 on p1.TagId = t1.Id join PostTags p2 on p1.PostId = p2.PostId join Tags t2 on p2.TagId = t2.Id where t1.TagName = '##tagname##' and t1.WikiPostId is not null and ( t2.ExcerptPostId is null or t2.WikiPostId is null ) group by t2.TagName order by count(p2.PostId) desc
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