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
http://www.nowcoder.com/practice/ae44b2b78525417b8b2fc2075b557592
掌握case...when...then...end的用法
select
device_id,
gender,
case
when age<20 then '20岁以下'
when age between 20 and 24 then '20-24岁'
when age>24 then '25岁及以上'
else '其他'
end as age_cut
from user_profile;
