Now the operator wants to check the answer details of all user questions from Zhejiang University. Please take out the corresponding data

 （1） Use nested queries

select device_id,question_id,result
from question_practice_detail
where device_id =
(
  select device_id from user_profile
    where university=' Zhejiang University '
)
order by question_id

 （2） Use connection query

	SELECT
    q.device_id,question_id,result
from 
    question_practice_detail as q,user_profile as u
WHERE
    q.device_id = u.device_id and university = ' Zhejiang University '

  notes ： When using nested queries , There can be many ideas , For example, we can also use in Instead of = Enrichment of implementation statements , The difference between the two , Using related subqueries can speed up the execution of code , It's easy for us to find