题解 | #牛客的课程订单分析(六)#

SELECT o.id,is_group_buy,if(is_group_buy='yes',null,name) client_name
FROM client c 
    right join (  select *,count(*) over(partition by user_id) cnt
            from order_info
            where date>'2025-10-15'
              and product_name in ('C++','Java','Python')
              and status='completed') o
    ON o.client_id=c.id
WHERE o.cnt>=2
ORDER BY o.id