Re: delete cascade
From: paul c <toledobythesea_at_oohay.ac>
Date: Mon, 16 Apr 2007 01:09:57 GMT
Message-ID: <F1AUh.81441$DE1.56905_at_pd7urf2no>
>
>
> Because some times it means: "If a line item exists, the invoice must
> also exist."
Date: Mon, 16 Apr 2007 01:09:57 GMT
Message-ID: <F1AUh.81441$DE1.56905_at_pd7urf2no>
Bob Badour wrote:
> paul c wrote:
>
>> I sometimes wonder why the above noun used in place of an adjective is >> needed. When the table/relation definition of a line item >> references an invoice number can it mean anything other than that the >> line item doesn't exist unless the invoice exists? Ie., why shouldn't >> delete always mean so-called "cascade"? >> >> (just trying to keep Marshall interested.) >> >> p
>
>
> Because some times it means: "If a line item exists, the invoice must
> also exist."
Please forgive my thickness, but doesn't "line item doesn't exist unless..." (ie., "only if") "...the invoice exists" mean the same?
p Received on Mon Apr 16 2007 - 03:09:57 CEST