题解 | #查看不同年龄段的用户明细#

select device_id,gender,
case when age <20 then '20岁以下'
     when age >=20 and age <=24 then '20-24岁'
     when age >=25 then '25岁及以上'
     else '其他'
end
as age_cut
from user_profile;