给出我的解题方法
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,
COUNT(*) as number
from user_profile
group by age_cut
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,
COUNT(*) as number
from user_profile
group by age_cut