Re: Extending my question. Was: The relational model and relational algebra - why did SQL become the industry standard?
Date: Thu, 13 Feb 2003 17:34:19 -0000
"Jan Hidders" <jan.hidders_at_REMOVE.THIS.ua.ac.be> wrote in message
> >and better optimisations would be obtained without duplicates"
> No. In fact, in theory, all optimizations that can be done in a set-based
> algebra can also be done in a bag-based algebra but not the other way
Obviously, I guess. A bag algebra being a superset of a set alegbra.
Business Intelligence, IBM Global Services Received on Thu Feb 13 2003 - 18:34:19 CET