select t2.exam_id , t2.duration , t2.release_time from ( select t1.exam_id , t1.duration , t1.release_time , t1.time_diff from ( select tb.exam_id , tb.duration , tb.release_time , timestampdiff(minute, ta.start_time, ta.submit_time) as time_diff , # 时间间隔 row_number() over(partition by ta.exam_id or...