在加入时从其他表中获取超过1个数据

Question

我认为查询的屏幕截图几乎是不言自明的。

我需要的只是从CustomerAddresses表中获取2个地址，而不是像本示例中那样仅获取1个地址。 ShippingAddress为 1，BillingAddress为 。

听起来这很容易解决这个问题，但显然我错过了一些东西。提前谢谢..

Answer 1

您需要加入包含地址两次的表。一次为ShippingAddressID，一次为BillingAddressID：

SELECT
    ...
    ShippingAddress.Address as 'ShippingAddress',
    BillingAddress.Address as 'BillingAddress',
    ...
FROM
    ...
    INNER JOIN CustomerAddresses as ShippingAddress
      ON Orders.ShippingAddressID = ShippingAddress.CustomerAddressID
    INNER JOIN CustomerAddresses as BillingAddress
      ON Orders.BillingAddressID = BillingAddress.CustomerAddressID