c# - SQL Server 条件连接

Question

我必须根据可以为空的值选择要加入的相应列。 详细说明:

SELECT shoporders.orderid, 
   shopaddresses.companyname, 
   shopaddresses.firstname, 
   shopaddresses.lastname, 
   shopaddresses.address1,  
FROM   shoporders 
   INNER JOIN shopaddresses 
           ON shoporders.InvoiceAddressId = shopaddresses.addressid
where orderid = 110
order by shoporders.createddate desc

如果 shoporders.InvoiceAddressId 为空，那么我必须使用 shoporders.DeliveryAddressId

有什么线索吗？

提前致谢

Answer 1

ON coalesce(shoporders.InvoiceAddressId, shoporders.DeliveryAddressId) = shopaddresses.addressid