题解 | #浙江大学用户题目回答情况#
浙江大学用户题目回答情况
http://www.nowcoder.com/practice/55f3d94c3f4d47b69833b335867c06c1
嵌套查询
select device_id,question_id,result
from question_practice_detail
where device_id = (select device_id from user_profile where university = '浙江大学');
