题解 | 计算25岁以上和以下的用户数量
计算25岁以上和以下的用户数量
https://www.nowcoder.com/practice/30f9f470390a4a8a8dd3b8e1f8c7a9fa
select '25岁以下' as age_cut, count(device_id) as number from user_profile where age <25 or age is null union all select '25岁及以上' as age_cut, count(device_id) as number from user_profile where age >=25
和上题没啥区别
