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Issue No.04 - Oct.-Dec. (2012 vol.34)
pp: 30-37
Serving as an informal technical introduction to this Annals special issue on relational database management systems, this article gives an introductory overview of the relational model and discusses the value of Edgar F. (Ted) Codd's model. Then, after providing an account of Chris Date's contributions, the author assesses the relational model's effect on the industry and how it might affect future developments.
Computational modeling, History, Relational databases, Database systems, SQL, history of computing, relational databases, software industry, Ted Codd, Chris Date, relations, relvars
Hugh Darwen, "The Relational Model: Beginning of an Era", IEEE Annals of the History of Computing, vol.34, no. 4, pp. 30-37, Oct.-Dec. 2012, doi:10.1109/MAHC.2012.50
1. E.F. Codd, "A Relational Model of Data for Large Shared Data Banks," Comm. ACM, vol. 13, no. 6, 1970, pp. 377–387. Earlier, Codd had published a preliminary version: "Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks," IBM Research Report RJ599, 9 Aug. 1969.
2. H. Darwen, "Business System 12," June 2011. PDF, slides, and notes on this presentation are available at third_manifesto.
3. C.J. Date interview by T. Haigh, Computer History Museum, June 2007; www.computerhistory. org/collections/accession 102658166.
4. C.J. Date, An Introduction to Database Systems, 8th ed., Addison-Wesley, 2004.
5. H. Darwen and C.J. Date, The Third Manifesto, This site also includes a language definition for Tutorial D.
6. C.J. Date and H. Darwen, Databases, Types, and The Relational Model: The Third Manifesto, 3rd ed., Addison-Wesley, 2007.
7. H. Darwen, "The Relational Model: A Tutorial," 2012;
8. Information Technology—Database Languages— SQL, Document ISO/IEC 9075, Int'l Organization for Standardization, 2011.
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