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 gender,count(*) from ( select device_id ,blog_url,( case when right(profile,6) = 'female' then 'female' else "male" end ) gender from user_submit)t group by gender
我尽力了,右边取六位,等于female 就是female ,其他就是male