> > What is the advantage of expressing a query in relational algebra?
>
> Both the relational algebra and the relational calculus have a sound
> theoretical foundation, which is somewhat lacking in SQL. There are
> constructive proofs that the relational algebra and the relational
> calculus are equally expressive. Some might argue that automated query
> re-write is easier to implement for the algebra.
>
> An equally important question is: What is the advantage of expressing
> a query in anything but the relational algebra?
My question above was rhetorical, and I agree with you that expressing
queries in relational algreba is preferrable.
Received on Thu Apr 10 2003 - 10:35:44 CDT
