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,
#多种情况使用when在case中分别讨论
(
case
when age < 20 then '20岁以下'
when age between 20 and 24 then '20-24岁'
when age >= 25 then '25岁及以上'
else '其他'
end
) as age_cut
from
user_profile;
