题解 | #计算男生人数以及平均GPA#
计算男生人数以及平均GPA
https://www.nowcoder.com/practice/7d9a7b2d6b4241dbb5e5066d7549ca01
select count(gender) male_num,round(avg(ifnull(gpa,0)),1) avg_gpa
from user_profile
where gender='male'
from user_profile
where gender='male'