#sql中case when end的用法
select device_id,gender,
case
when age>=25 then '25岁及以上'
when age>=20 then '20-24岁'
else '其他'
end as age_cut
from user_profile;
#sql中case when end的用法
select device_id,gender,
case
when age>=25 then '25岁及以上'
when age>=20 then '20-24岁'
else '其他'
end as age_cut
from user_profile;