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岁以下'
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
group by device_id, gender, age_cut;
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