题解 | #截取出年龄#
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select
age ,
count(*)
from
(select
substring_index(substring_index(profile,',',3),',',-1) as age
from user_submit) a
group by a.age
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select
age ,
count(*)
from
(select
substring_index(substring_index(profile,',',3),',',-1) as age
from user_submit) a
group by a.age
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