Bob Badour wrote:
> Gene Wirchenko wrote:
>> Cimode <cimode_at_hotmail.com> wrote:
>>> On May 2, 11:18 am, Jon Heggland <jon.heggl..._at_idi.ntnu.no> wrote:
>>>> you could say (as D&D do) that a database is a variable---a
>>>> dbvar---which has a db value. Which is a tuple.
>>
>>> Stating that a database is a relation is much safer.
>>
>> But likely inaccurate. It may (and probably will) consist of more
>> than one relation.
>
> If one accepts the idea of relation valued attributes, then one could
> look at the dbms as a single tuple with a 0-ary candidate key and an RVA
> for each relvar.
A single relvar, you mean? Tuples don't have keys. Is a relvar with an
empty key safer than a tuple variable? What does "safer" mean?
--
Jon
Received on Wed May 02 2007 - 14:30:48 CDT
