👨🏫 参考题解
Code
select contest_id, ROUND(COUNT(user_id) * 100 / (select count(*) from users),2) as percentage
from register
group by contest_id
order by percentage desc, contest_id asc
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👨🏫 参考题解
select contest_id, ROUND(COUNT(user_id) * 100 / (select count(*) from users),2) as percentage
from register
group by contest_id
order by percentage desc, contest_id asc
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