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 between 20 and 24 then "20-24岁" when age>=25 then "25岁及以上" else "其他" end age_cut from user_profile