题解 | #统计每种性别的人数#
统计每种性别的人数
https://www.nowcoder.com/practice/f04189f92f8d4f6fa0f383d413af7cb8
select substring_index(a.profile,",",-1) as gender, count(1) as number from user_submit a group by substring_index(a.profile,",",-1)
查个mysql的函数搞半天，对mysql不熟悉