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 b.rangeAge = 1 then '25岁以下' else '25岁及以上'
end
) as age_cut,
count(1) as number
from
(
select
(
case
when a.age is null then 1
when a.age < 25 then 1
else 0
end
) as rangeAge
from
user_profile a
) b
group by
b.rangeAge
这样写虽然很蠢，但能联系练习练习case when
投递平安人寿等公司10个岗位
