IBM System R

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For the statistical programming language, see R (programming language)

IBM System R is a database system built as a research project at IBM San Jose Research (now IBM Almaden Research Center) in the 1970s. System R was a seminal project: it was a precursor of SQL, which has since become the standard relational data query language. It was also the first system to demonstrate that a relational database management system could provide good transaction processing performance. Design decisions in System R, as well as some fundamental algorithm choices (such as the dynamic programming algorithm used in query optimization^[1]), influenced many later relational systems.

System R's first customer was Pratt & Whitney in 1977. [1]

[edit] See also

^ Selinger, P. G.; Astrahan, M. M.; Chamberlin, D. D.; Lorie, R. A.; Price, T. G. (1979), "Access Path Selection in a Relational Database Management System", Proceedings of the 1979 ACM SIGMOD International Conference on Management of Data, pp. 23–34, doi:10.1145/582095.582099

This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL.

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