with t1 as ( select uid, register_time from user_info where job = '算法' ), t2 as ( select a.uid, a.exam_id, a.start_time, a.submit_time, a.score, b.tag from exam_record as a left join examination_info as b on a.exam_id = b.exam_id ), t3 as ( select t2.uid, t2.exam_id, t2.start_time, t2.submit_time, t...