Integrity (consistency) was the biggest point of relational database theory itself. > The true importance of relational theory is highlighted by the title of t

Integrity (consistency) was the biggest point of relational database theory itself. > The true importance of relational theory is highlighted by the title of the original (and considerably shorter) version of Codd’s first paper. That version predated the published version by a year, and the title was “Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks.”[1] The title of this unpublished version emphasizes that the real importance of relational theory is that it provides a rigorous method of asserting arbitrarily complex consistency constraints that must be satisfied by the data within the database. https://iggyfernandez.wordpress.com/2013/04/24/whats-so-sacred-about-relational-anyway/3/ https://iggyfernandez.wordpress.com/2013/04/24/whats-so-sacr... [1] http://www.liberidu.com/blog/images/rj599.pdf http://www.liberidu.com/blog/images/rj599.pdf