题解 | #截取出年龄#
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select
substring_index(substring_index(profile, ',', 3), ',', -1) as age,
count(device_id) as number
from
user_submit
group by
age;
#华为机试，emo了##华为##华为算法题#
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