题解 | #统计每种性别的人数#
统计每种性别的人数
http://www.nowcoder.com/practice/f04189f92f8d4f6fa0f383d413af7cb8
case语句+模糊查询=笨蛋题解！ 了解case语句语法和模糊查询规则即可！ select case when profile like '%,male' then 'male' when profile like '%,female' then 'female' end gender,count(device_id) from user_submit group by gender;
