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 substring_index(profile,',',-1) = "male" then "male" when substring_index(profile,',',-1) = "female" then "female" end ) as gender, count(device_id) as number from user_submit group by gender;#SQL练习#