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
select device_id, gender,
case
when age < 20 then '20岁以下'
when age <= 24 and age >= 20 then '20-24岁'
when age >= 25 then '25岁及以上'
else '其他'
end as age_cut
from user_profile
if(age>20, ' ', ' ') case when age > 20 then ' ' else ' ' end
查看15道真题和解析