题解 | #截取出年龄#
截取出年龄
http://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
提供substr的思路
select
SUBSTR(profile,12,2) as age,
count(device_id) as number
from user_submit
group by SUBSTR(profile,12,2)
截取出年龄
http://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
提供substr的思路
select
SUBSTR(profile,12,2) as age,
count(device_id) as number
from user_submit
group by SUBSTR(profile,12,2)
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