题解 | #查看不同年龄段的用户明细#

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) AS age_cut FROM user_profile