题解 | #牛客的课程订单分析(四)#
牛客的课程订单分析(四)
https://www.nowcoder.com/practice/c93d2079282f4943a3771ca6fd081c23
select
user_id
,min(date) first_buy_day
,count(*) cnt
from order_info
where date >= '2025-10-15'
and status = 'completed'
and product_name in ('C++','Java','Python')
group by 1
having count(*) >= 2
order by 1
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