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(profile,15,99)='male' then 'male'
WHEN substring(profile,15,99)='female' then 'female'
END as gender,count(device_id) as number
from user_submit
group by gender