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