select u.device_id, u.university, count(q.question_id) as question_cnt, sum(q.result='right') as right_question_cnt from user_profile u left join question_practice_detail q on u.device_id=q.device_id where u.university = '复旦大学' group by u.device_id
select u.device_id, u.university, count(q.question_id) as question_cnt, sum(q.result='right') as right_question_cnt from user_profile u left join question_practice_detail q on u.device_id=q.device_id where u.university = '复旦大学' group by u.device_id