题解 | #截取出年龄#
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
SELECT age,COUNT(*) number
FROM (SELECT SUBSTR(PROFILE,12,2) age
FROM user_submit) ages
GROUP BY age
FROM (SELECT SUBSTR(PROFILE,12,2) age
FROM user_submit) ages
GROUP BY age
