题解 | #截取出年龄#
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select
substring(profile,12,2) age,
count(device_id) number
from user_submit
group by age;
substring(profile,12,2) age,
count(device_id) number
from user_submit
group by age;