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Q&A for students, teachers, polyglots, and anyone interested in the techniques of second-language acquisition

select top 100 hc.UserId [User Link], count(*) HammerClosed, 
  count(hr.Id) Reopened,
  Round(count(hr.Id)*100.0/count(*),0) PctError
from PostHistory hc
left join PostHistory hr on hr.PostId=hc.PostId and hr.CreationDate > hc.CreationDate and hr.PostHistoryTypeId=11
where hc.PostHistoryTypeId=10
and hc.Comment like '101%'
and hc.Text like '%BindingReason":{"GoldTagBadge%'
and hc.CreationDate > getdate()-365
group by hc.UserId
order by count(*) desc

fork query

edited jan 21 16

created jan 21 16 anonymous