# 取出平均发贴数低于5的学校或平均回帖数小于20的学校 select university, avg(question_cnt), avg(answer_cnt) from user_profile group by university having avg(question_cnt) < 5 or avg(answer_cnt) < 20 ;
# 取出平均发贴数低于5的学校或平均回帖数小于20的学校 select university, avg(question_cnt), avg(answer_cnt) from user_profile group by university having avg(question_cnt) < 5 or avg(answer_cnt) < 20 ;