题解 | #牛客的课程订单分析(三)#

select id,user_id,product_name,    status,    client_id,    date
from (
    select *,count(*) over(partition by user_id) cnt
from order_info
where date>'2025-10-15' and order_info.status = 'completed' 
and order_info.product_name in('C++','Java','Python')
) tmp
where cnt>1
order by id