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(device_id) 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(device_id) AS number FROM user_submit GROUP BY age;
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