题目: 现在运营想要了解复旦大学的每个用户在8月份练习的总题目数和回答正确的题目数情况,请取出相应明细数据,对于在8月份没有练习过的用户,答题数结果返回0.
select u.device_id,university,count(question_id) question_cnt, sum(if(result='right',1,0)) as right_question_cnt from user_profile u left join question_practice_detail qpd on u.device_id=qpd.device_id and month(date)='8' where university='复旦大学' group by u.device_id;



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