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 case when profile regexp'female$' then 'female' else 'male' end as gender, count(device_id) from user_submit group by gender
利用正则表达式REGEXP,以'male'结尾显然会引起异议,所以这里使用'female$'查找以female结尾即可。