题解 | #考试分数(二)#
牛客的课程订单分析(二)
http://www.nowcoder.com/practice/4ca4137cb490420cad06d2147ae67456
select user_id from order_info
where product_name in('C++','Java','Python')
and date > '2025-10-15'
and status = 'completed'
group by user_id having count(user_id)>=2
order by user_id
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