# Re: Can relational alegbra perform bulk operations?

From: Tegiri Nenashi <tegirinenashi_at_gmail.com>

Date: Tue, 29 Sep 2009 14:54:54 -0700 (PDT)

Message-ID: <bb6ab928-cf93-4a46-ac41-e058a1305d13_at_f16g2000yqm.googlegroups.com>

On Sep 29, 1:01 pm, paul c <toledobythe..._at_oohay.ac> wrote:

Date: Tue, 29 Sep 2009 14:54:54 -0700 (PDT)

Message-ID: <bb6ab928-cf93-4a46-ac41-e058a1305d13_at_f16g2000yqm.googlegroups.com>

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)? Received on Tue Sep 29 2009 - 16:54:54 CDT