คำตอบที่ผู้ใช้ยอมรับ - นับ ไม่จำเป็นต้องใช้ตารางทั้งหมด
Answers Accepted By Users - Count.It is not neccessary to use all the tables.
 PostLinks:  Id [ number]  CreationDate [ time]  PostId [ number]  RelatedPostId [ number]  LinkTypeId [ number] 
SELECT Users.Id, Users.DisplayName, COUNT(ans.Id) FROM Users AS users JOIN Posts AS qtns ON qtns.PostTypeId = 1 AND Users.Id = qtns.OwnerUserId JOIN Posts AS ans ON ans.PostTypeId = 2 AND qtns.AcceptedAnswerId = ans.Id WHERE ans.OwnerUserId = @UserId GROUP BY Users.Id, Users.DisplayName ORDER BY COUNT(ans.Id) DESC