题解 | #计算25岁以上和以下的用户数量#
计算25岁以上和以下的用户数量
https://www.nowcoder.com/practice/30f9f470390a4a8a8dd3b8e1f8c7a9fa
select case when age < 25 or age is null then '25岁以下'
when age >= 25 then '25岁及以上'
end as age_cut
,count(1) as number
from user_profile
group by case when age < 25 or age is null then '25岁以下'
when age >= 25 then '25岁及以上'
end
;
