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
substring_index (profile, ',', -1) as gender,
count(*) as number
from
user_submit
group by
gender;
select
case
when profile like '%,male' then 'male'
when profile like '%,female' then 'female'
else '其他'
end as gender,
count(*) as number
from
user_submit
group by gender;
substring_index其实挺好用的
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