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 or age is null then "其他" when age >=20 && age <=24 then "20-24岁" else "25岁及以上" end) as age_cut from user_profile;