题解 | #查看不同年龄段的用户明细#
查看不同年龄段的用户明细
https://www.nowcoder.com/practice/ae44b2b78525417b8b2fc2075b557592
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'
when age is null then '其他'
end as age_cut
from user_profile
