# Re: Can relational alegbra perform bulk operations?

From: paul c <toledobythesea_at_oohay.ac>

Date: Tue, 29 Sep 2009 22:14:41 GMT

Message-ID: <lFvwm.45870$Db2.27580_at_edtnps83>

Tegiri Nenashi wrote:

Date: Tue, 29 Sep 2009 22:14:41 GMT

Message-ID: <lFvwm.45870$Db2.27580_at_edtnps83>

Tegiri Nenashi wrote:

*> On Sep 29, 1:01 pm, paul c <toledobythe..._at_oohay.ac> wrote:*>> Tegiri Nenashi wrote: >> >> ... >> >>> It is too vague. Algebras, in general, don't care about the structure >>> of their elements; relational algebra, in particular, doesn't refer to >>> tuples. ... >> It might be clearer to say that while the algebra's ops don't refer to >> tuples, the sets involved certainly do contain tuples and as far as I >> know, there are no relational ops that can be defined without reference >> to tuples.

*>**> But this is like saying that one can't define summation and**> multiplication in a ring with abstract elements. You wouldn't insist**> that any advanced algebra book had a long arithmetic introduction with**> tedious instructions how one adds and multiplies numbers (in their**> decimal representation)?*When it comes to relational algebra, I doubt if there are any advanced books! Received on Tue Sep 29 2009 - 17:14:41 CDT