select device_id,gender,
(case when age<20 then "20岁以下"
when age between 20 and 24 then "20-24岁"
when age>=25 then "25岁及以上"
else "其他" end) age_cut
from user_profile;
(case when age<20 then "20岁以下"
when age between 20 and 24 then "20-24岁"
when age>=25 then "25岁及以上"
else "其他" end) age_cut
from user_profile;