题解 | #创建一个actor_name表#
牛客的课程订单分析(二)
http://www.nowcoder.com/practice/4ca4137cb490420cad06d2147ae67456
select t.user_id
from
(select user_id
from order_info
where date>'2025-10-15'
and status='completed'
and product_name in ('C++','Java','Python')) t
group by user_id
having count(*)>=2
order by user_id;
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