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
case
when age < 25 or age is null then "25岁以下"
else "25岁及以上"
end as age_cut,
count(*) as number
from user_profile
group by age_cut
order by
case
when age_cut="25岁以下" then 1
else 2
end;
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