题解 | #截取出年龄#
截取出年龄
http://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
substring_index互相嵌套
select substring_index(SUBSTRING_INDEX(profile,',',3),',',-1)age, count(profile)number from user_submit group by age
截取出年龄
http://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select substring_index(SUBSTRING_INDEX(profile,',',3),',',-1)age, count(profile)number from user_submit group by age
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