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
t1.user_id,
min(t1.date) first_buy_date,
count(*) cnt
from
order_info t1
where
t1.status = 'completed'
and t1.product_name in ('C++','Java','Python')
and t1.date > '2025-10-15'
group by
t1.user_id
having
count(t1.user_id) > 1
order by
t1.user_id
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