题解 | #浙江大学用户题目回答情况#

select qd.device_id,question_id,result from question_practice_detail as qd INNER JOIN user_profile as up ON up.device_id = qd.device_id WHERE university = "浙江大学"

需要指明连接的列名具体是属于哪张表的，否则会报错

select device_id,question_id,result from question_practice_detail as qd INNER JOIN user_profile as up ON up.device_id = qd.device_id WHERE university = "浙江大学"

比如直接select device_id就会报错