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 if(age>=25,'25岁及以上','25岁以下') as age_cut,count(*) as number
from user_profile
group by age_cut;
select
(case
when age>=25 then '25岁及以上'
else '25岁以下'
end ) as age_cut,
count(*) as number
from user_profile
group by age_cut
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