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(device_id) number from user_submit group by 1
substring_index的复合函数使用
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select substring_index (substring_index (profile, ',', '3'), ',', '-1') age, count(device_id) number from user_submit group by 1
substring_index的复合函数使用
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