Abstract
It is shown how the theory of cylindric algebras (a notion introduced by Tarski and others as a tool in the algebraization of the first order predicate calculus) can give a new insight into Codd's relational model of data. The relational algebra of Codd can be embedded in a natural way into a cylindric algebra where the join operation becomes the usual set-theoretical intersection. It is shown, by using known facts from the theory of cylindric algebras, that a version of the relational algebra is not finitely axiomatizable and that the equivalence problem for certain relational expressions is undecidable. A duality between the project-join and selectunion operator pairs is also briefly discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
