ฮิสโตแกรมของเวลาในการตอบคำถามแรก ไม่จำเป็นต้องใช้ทุกตาราง
Histogram of time to first answer.It is not neccessary to use all the tables.
 PendingFlags:  Id [ number]  FlagTypeId [ number]  PostId [ number]  CreationDate [ time]  CloseReasonTypeId [ number]  CloseAsOffTopicReasonTypeId [ number]  DuplicateOfQuestionId [ number]  BelongsOnBaseHostAddress [ text] 
SELECT hours_to_first_answer, COUNT(*) AS answer_count FROM (SELECT qId, MIN(hours_to_answer) AS hours_to_first_answer FROM (SELECT questions.Id AS qId, questions.CreationDate AS qCreationDate, answers.Id AS aId, answers.CreationDate AS aCreationDate, CAST((JULIANDAY(CreationDate) - JULIANDAY(questions.CreationDate)) * 24.0 AS INT) AS hours_to_answer FROM Posts AS questions INNER JOIN Posts AS answers ON questions.Id = answers.ParentId) AS qa GROUP BY qId) AS latency WHERE hours_to_first_answer >= 0 AND hours_to_first_answer < 168 GROUP BY hours_to_first_answer ORDER BY hours_to_first_answer