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 like '%,male' then 'male' when profile like '%,female' then 'female' else 'null gender' end as gender, count(1) from user_submit group by gender
case第一次写,注意 when X like A then 自己定义A
else ' B '
count(1)是对第一列的计数