题解 | #截取出年龄#
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select substring(profile,12,2) age ,count(*) number from user_submit group by age;
substring(str, n, len)
记得group by按照年龄分组
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select substring(profile,12,2) age ,count(*) number from user_submit group by age;
substring(str, n, len)
记得group by按照年龄分组
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