--这question_practice_detail，user_profile俩表关联，关联字段device_id，并且限制用户为浙江大学就可以 select question_practice_detail.device_id, question_practice_detail.question_id, question_practice_detail.result from question_practice_detail,user_profile where question_practice_detail.device_id=user_profile.device_id and us...
