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(*)
from user_submit
group by age;
select substring_index(substring_index(profile, ",", -2), ",", 1) as age, count(*)
from user_submit
group by age; -- 朝前截取或者朝后截取都可以

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01-12 20:31
东北大学 Java
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