Zero and non-zero accepted count. Self-accepted answers do not count.
Q&A for students, teachers, polyglots, and anyone interested in the techniques of second-language acquisition
-- How Unsung am I?
-- Zero and non-zero accepted count. Answers must be old enough, not self-accepted and not Community Wiki.
-- Answers must be at least 10 days old to qualify.
count(a.Id) as [Accepted Answers],
sum(case when a.Score = 0 then 0 else 1 end) as [Scored Answers],
sum(case when a.Score = 0 then 1 else 0 end) as [Unscored Answers],
sum(CASE WHEN a.Score = 0 then 1 else 0 end)*1000 / count(a.Id) / 10.0 as [Percentage Unscored]
on a.Id = q.AcceptedAnswerId
a.CommunityOwnedDate is null
and a.OwnerUserId = ##UserId##
and q.OwnerUserId != ##UserId##
and a.postTypeId = 2
and a.CreationDate <= DATEADD(day, -10, GETDATE())