โดยไม่มีคำตอบเดียว ไม่จำเป็นต้องใช้ทุกตาราง
s without a single answer.It is not neccessary to use all the tables.
 Comments:  Id [ number]  PostId [ number]  Score [ number]  Text [ text]  CreationDate [ time]  UserDisplayName [ text]  UserId [ number]  ContentLicense [ text] 
SELECT COUNT(*) FROM Posts WHERE PostTypeId = 1 AND AnswerCount = 0