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(1)
from user_profile group by age_cut;
/*下面也行*/
select
case
when age>=25 then '25岁及以上'
else '25岁以下'
end as age_cut,
count(1) from user_profile group by age_cut;
