FROM - ON - JOIN - WHERE - GROUP BY - WITH - HAVING - SELECT - DISTINCT - ORDER BY - LIMIT

select university, avg(question_cnt) as avg_question_cnt 
from user_profile
group by university
order BY avg_question_cnt

# FROM - ON - JOIN - WHERE - GROUP BY - WITH - HAVING - SELECT - DISTINCT - ORDER BY - LIMIT

所以order by 跟在 group by 后面