Revision as of 19:00, 9 September 2002 edit Leandrod (talk \| contribs) 20,480 edits No edit summary		Revision as of 15:09, 9 October 2002 edit undo Bryan Derksen (talk \| contribs) Extended confirmed users 95,333 edits mNo edit summary Next edit →
Line 1: According to [[Fabian Pascal]], a data model is ''a general theory of data defining structural, integrity and manipulation features.'' For example, the general theory in the relational model is two-valued predicate logic and set theory; the structure is that of relations; integrity is assured by declared constraints, and manipulation is made ~~thru~~through relational algebra and calculus.

Data model: Difference between revisions