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(*) as number from user_profile where age is null or age < 25 union select '25岁及以上' as age_cut, count(*) as number from user_profile where age >= 25;
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