Re: circular relationships ok?

From: Marshall Spight <>
Date: 2 Mar 2006 14:23:49 -0800
Message-ID: <>

David Portas wrote:


> For example, suppose I want to implement a constraint that each Order
> must have exactly one Invoice and each Invoice must have exactly one
> Order. That seems like a reasonable business rule, even if it's a
> slightly unusual one.

If that is the business rule, then are not Invoices and Orders the same entity?

Marshall Received on Thu Mar 02 2006 - 23:23:49 CET

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