Q&A for professional and enthusiast programmers
-- -- select CAST(a.zero_voted_answers*100.0 as float)/a.total_answers as percentage from (select count(*) as total_answers , count(CASE WHEN Score = 0 then 1 ELSE NULL END) as zero_voted_answers from posts where OwnerUserId = ##UserId## and PostTypeId = 2 ) as a