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(*) as number
from user_submit
group by age
易错:substring_index 是截取前几个
需要套娃
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select substring_index(substring_index(profile,",",3),",",-1) as age ,
count(*) as number
from user_submit
group by age
易错:substring_index 是截取前几个
需要套娃
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