task11111

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Motor Vehicle Maintenance and Repair Meta

Q&A about the site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles

select OwnerDisplayName
from(
select OwnerDisplayName,
rank() over(order by
CAST(count(case when AcceptedAnswerId is not NULL then 1 else 0 end) as float)/count(*)DESC) AS rnk
from posts
group by OwnerDisplayName
having count(*)>20
)temp where temp.rnk = 1
group by OwnerDisplayName

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