Answer rate over time

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Server Fault

Q&A for system and network administrators

select year(CreationDate) as Year, 
count(*) as 'Question Count',
coalesce(count(case when AnswerCount > 0 then 0 end)*100/count(*), 0) as 'Answer Rate', 
coalesce(count(case when ClosedDate != 0 then 1 end)*100/count(*), 0) as 'Closure Rate'
from Posts
where PostTypeId = 1
group by year(CreationDate)
order by year(CreationDate)
-- and ap.AnswerCount = 0

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