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
套娃也是一种很好的办法。
注意不要少打了符号,
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
套娃也是一种很好的办法。
注意不要少打了符号,
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