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;
