ได้คำตอบเป็นตัวเลขตามเวลา t.ไม่จำเป็นต้องใช้ตารางทั้งหมด
get number answers after time t.It is not neccessary to use all the tables.
 ReviewTaskTypes:  Id [ number]  Name [ text]  Description [ text] 
SELECT QuestionPost.Id, SUM(CASE WHEN AnsweringPostWithinInterval.Id IS NULL THEN 0 ELSE 1 END) AS num_answering_after_t FROM Posts AS QuestionPost LEFT JOIN Posts AS AnsweringPostWithinInterval ON AnsweringPostWithinInterval.ParentId = QuestionPost.Id AND AnsweringPostWithinInterval.CreationDate > DATEADD(dd, 1, QuestionPost.CreationDate) AND AnsweringPostWithinInterval.ClosedDate IS NULL WHERE QuestionPost.PostTypeId = (SELECT Id FROM PostTypes WHERE Name = 'Question') AND QuestionPost.ClosedDate IS NULL AND QuestionPost.Id % 158 = 0 GROUP BY QuestionPost.Id