Artificial intelligence

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ISSN 2710-1673

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A double Complement Law and a Difference Transformation Rule in Table Algebra

Senchenko A.1
1 Donbas State Pedagogical University

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UDC: 004.655
Publication Language: Russian
Stuc. intelekt. 2013; 18(2):139–144

Abstract: In this paper is found the necessary and sufficient conditions due to which in table algebra are fulfilled the double complement law and the difference transformation rule. This conditions are illustrated in exemples.

Keywords: table algebra, active complement, difference, database

References:

  1. Codd E.F. A Relational Model of Data for Large Shared Data Banks / E.F. Codd // Communications ofthe ACM. – 1970. – V. 13, №. 6. – P. 377-387.
  2. Relational data base: table algebras and family of the SQL languages / [V.N. Redko, U.I. Brona,D.B. Buy, S.А. Polyakov]. – Kiev : Publisher «Academperiodica», 2001. – 198 р. (in Ukrainian).
  3. D. Maier. The theory of Relational Databases / D. Maier ; [translation from English]. – Moscow : «Mir»,1987. – 608 p. (in Russian).

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