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UML and Data Modeling: A Reconciliation by David Hay

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The Oracle Database Management System began its existence as a secret project for the CIA and was subsequently introduced as a commercial product in 1978. Ingres was first created as a research project at the University of California, Berkeley, starting at about the same time as Oracle. Ingres generally was the better-featured product, moving a little earlier than Oracle into application development tools, distributed databases, etc., whereas Oracle seems to be ahead on the most important attributes, such as SQL compatibility — Oracle always used IBMs suggested standard of SQL, while Ingres at first used the arguably superior Quel from the INGRES research project. Oracle eventually pulled ahead on superior/more aggressive ...

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