Question

select CustomerKey, FirstName, LastName
from DimCustomer
where CustomerKey in
    (select distinct CustomerKey
     from FactInternetSales
     where year(OrderDate) = 2005 or year(OrderDate) = 2006
        or year(OrderDate) = 2007 or year(OrderDate) = 2008);

我应该在哪里添加“超过30个订单”部分？

Answer 1

通过使用联接和聚合过滤器尝试以下操作

select DimCustomer.CustomerKey,
 DimCustomer.FirstName, DimCustomer.LastName,year(FactInternetSales.OrderDate),count(*)
from DimCustomer join FactInternetSales
 on DimCustomer.CustomerKey=FactInternetSales.CustomerKey
group by CustomerKey, FirstName, LastName,year(FactInternetSales.OrderDate)
having count(*)>=30

Answer 2

您的方法可行，但是您需要group by，而不是select distinct：

select c.CustomerKey, c.FirstName, c.LastName
from DimCustomer c
where c.CustomerKey in (select fis.CustomerKey
                        from FactInternetSales fis
                        where fis.OrderDate >= '2005-01-01' and
                              fis.OrderDate < '2009-01-01'
                        group by year(fis.OrderDate)
                        having count(*) >= 30
                       );

如果要将结果限制为特定时间段，请在子查询中使用where子句。

关于如何列出一年内下订单超过30个的客户的SQL

2 个答案: