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 (profile, ',', -1) as gender, count(*) as number FROM user_submit GROUP BY gender;
用的substring_index
写是写出来了,但居然卡在count()上面
之前傻傻地在count(gender),看了眼高赞回复,原来count(*)就可以了(抓狂.jpg)