Question

我有一张发票，InvocicesLines和产品表，我想选择具有两种不同产品的所有发票。

我该怎么做？

示例：发票表：

InvoiceNo  |   CustomerId    |  ...
=============+===============+========+
1          |   1             |   
2          |   2             |   
3          |   5             |   
4          |   7             |

InvoicesLines表：

InvoiceNo (FK) |   Id (PK)     |  ProductId |
===============+===============+============+
1              |   1           |    3       |
2              |   2           |    1       |
2              |   3           |    2       |
4              |   4           |    5       |

我需要包含产品1和2的发票。

InvoiceNo   |
============+
2           |

Answer 1

您可以将发票与行合并两次，然后退回具有不同产品的发票。您必须将结果分组。

select Invoices.IdInvoice
from Inovices
     inner join InvoicesLines as First on First.IdInvoice = Invoices.IdInvoice
     inner join InvoicesLines as Second on Second.IdInvoice = Invoice.IdInvoice
where First.IdProduct <> Second.IdProduct
group by Invoices.IdInvoice

这将返回具有至少两种不同产品的所有发票。

但是，如果您想退回带有两种不同产品的发票，并且只退回两种不同的产品，则可以通过有争议的条款来确保退回。

select Invoices.IdInvoice
from Inovices
     inner join InvoicesLines as First on First.IdInvoice = Invoices.IdInvoice
     inner join InvoicesLines as Second on Second.IdInvoice = Invoice.IdInvoice
where First.IdProduct <> Second.IdProduct
group by Invoices.IdInvoice
having count(Invoices.IdInvoice) = 2

Answer 2

按发票编号分组，并使用hading子句仅返回那些具有不同产品数量等于2（或如果要“至少有两个产品”，则大于1）的发票：

select i.InvoiceNumber
from Inoices i
inner join InvoiceLines il on il.InvoiceId = i.InoiceId
group by i.InvoiceNumber
having count(distinct il.ProductId) = 2

检查两个产品是否属于同一张发票

2 个答案: