题解 | #截取出年龄#
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
SELECT substring_index(substring_index(profile,',',-2),',',1) as age, count(*) as number FROM user_submit GROUP BY age
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
SELECT substring_index(substring_index(profile,',',-2),',',1) as age, count(*) as number FROM user_submit GROUP BY age
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