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) age,count(*) number from user_submit group by age
substring_index(FIELD, sep, n)可以将字段FIELD按照sep分隔:
(1)当n大于0时取第n个分隔符(n从1开始)之前的全部内容;
(2)当n小于0时取倒数第n个分隔符(n从-1开始)之后的全部内容;
先取出180cm,75kg,27 再取 27