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 age_cut,count(age_cut) as number from -- 子查询 (select *, (case when age<25 or age is null then'25岁以下' when age>=25 then'25岁及以上' end) as age_cut from user_profile) as a group by age_cut;
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