Ivan Mezník

(Faculty of Business and Management, Institute of Informatics, Brno University of Technology, Czech Republic)

 

 

Abstract: The paper points to highly useful symbiosis of manipulations in databases and operation on relation-type mathematical structures. The common context of n-ary relation tools and database structures means is discussed and the correspondence between n-ary relation operations and standard database constructions is examined. Also some relevant mathematical problems are pointed out.

 

 

Key words: n-ary relation; relation data model; projection; selection; join; E-join; θ-join

 

JEL codes: C6, C8