Re: foreign key constraint versus referential integrity constraint
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Mon, 26 Oct 2009 10:26:42 -0300
Message-ID: <4ae5a395$0$23778$9a566e8b_at_news.aliant.net>
>
> I was just (humorously seriously) giving examples of such peculiar
> comparisons that I'd say have reasons.
Date: Mon, 26 Oct 2009 10:26:42 -0300
Message-ID: <4ae5a395$0$23778$9a566e8b_at_news.aliant.net>
compdb_at_hotmail.com wrote:
> On Oct 25, 7:44 am, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
>
>>com..._at_hotmail.com wrote: >> >>>On Oct 24, 8:56 pm, Bob Badour <bbad..._at_pei.sympatico.ca> wrote: >> >>>>What reason would one have to define an equality comparison to compare >>>>employee ids with department ids or with names? Or charge with current >>>>or potential? Or age with price? >> >>>shoot your age and you are worth your weight in gold. >> >>My age in what measure? Years? Integral or rational? If integral, >>cardinal or ordinal? According to what calendar?
>
> I was just (humorously seriously) giving examples of such peculiar
> comparisons that I'd say have reasons.
But surely you understand that's what type casts are for. Right?
> Otherwise I agree with you.
> Certainly the corresponding expressions depend on
> the variable and function predicates.
>
> philip
Received on Mon Oct 26 2009 - 14:26:42 CET