题解 | #查看不同年龄段的用户明细#

select
    device_id,
    gender,
    case
        when age < 20 then '20岁及以下'
        when age between 20 and 24  then '20-24岁'
        when age >= 25 then '25岁及以上'
        when age is null then '其他'
    end age_cut
from
    user_profile