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An algebra of quotient relations

Published: 03 August 1977 Publication History

Abstract

An algebra which operates on partitioned relations is developed. Relation partitioning is achieved by defining equivalence relations on n-ary relations. It is shown that the algebra is as powerful as the original relational algebra, having the advantage of a set-processing capability. This feature provides both greater flexibility in query specification and efficient query processing.

References

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Codd, E. F., "Relational Completeness of Data Base Sublanguages", Data Base Systems ed. by R. Rustin.
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Chamberlin, D. And Boyce, R., "SEQUEL: A Structured English Query Language", Proc. ACM-SIGMOD Workshop on Data Description, Access, and Control, May 1974, pp. 249-264.
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Chamberlin, D. D., et al, "SEQUEL 2: A Unified Approach to Data Definition, Manipulation, and Control", IBM Research Report RJ 1798, San Jose, June, 1976.
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Kerschberg, L., Ozkarahan, E. A. and Pacheco, J. E. S., "A Synthetic English Query Language for a Relational Associative Processor", Proc. Second International Conference on Software Engineering, San Francisco, Oct., 1976, pp. 505-519.
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cover image ACM Conferences
SIGMOD '77: Proceedings of the 1977 ACM SIGMOD international conference on Management of data
August 1977
181 pages
ISBN:9781450373432
DOI:10.1145/509404
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 03 August 1977

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Author Tags

  1. high level query language
  2. intermediate level language
  3. query language
  4. quotient algebra
  5. quotient relations
  6. relational algebra
  7. relational model

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