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Relational Databases: Codd, Stonebraker, and Ellison
IT Professional, 2016In 1970, an article by Edgar F. Codd determined the primary direction of high-level database languages for the next 40 years. The authors give an overview of the relational model for database systems, then highlight three of the masterminds who created and developed it: Codd, Michael Stonebraker, and Larry Ellison.
George O. Strawn, Candace Strawn
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A foundation of CODD's relational maybe-operations
ACM Transactions on Database Systems, 1983Database relations which possibly contain maybe-tuples and null values of type “value at present unknown” are studied. Maybe-tuples and null values are formally interpreted by our notion of representation , which uses classical notions of predicate logic, elaborates Codd's proposal of maybe-tuples, and adopts Reiter'
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Educational Philosophy and Theory, 2008
(2008). John Codd Obituary. Educational Philosophy and Theory: Vol. 40, No. 4, pp. 467-470.
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(2008). John Codd Obituary. Educational Philosophy and Theory: Vol. 40, No. 4, pp. 467-470.
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On Codd Families of Keys over Incomplete Relations
The Computer Journal, 2010Keys allow a database management system to uniquely identify tuples in a database. Consequently, the class of keys is of great significance for almost all data processing tasks. In the relational model of data, keys have received considerable interest and are well understood.
Sven Hartmann, Uwe Leck, Sebastian Link
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Boyce-Codd normal form decomposition
Computers and Mathematics With Applications, 1997B Gopinath
exaly