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MLA
Rivero, Laura C. "Inclusion Dependencies."
Encyclopedia of Information Science and Technology, First Edition.
IGI Global, 2005. 1425-1430. Web. 11 Dec. 2019. doi:10.4018/978-1-59140-553-5.ch251
APA
Rivero, L. C. (2005). Inclusion Dependencies. In M. Khosrow-Pour, D.B.A. (Ed.),
Encyclopedia of Information Science and Technology, First Edition
(pp. 1425-1430). Hershey, PA: IGI Global. doi:10.4018/978-1-59140-553-5.ch251
Chicago
Rivero, Laura C. "Inclusion Dependencies." In
Encyclopedia of Information Science and Technology, First Edition,
ed. Mehdi Khosrow-Pour, D.B.A., 1425-1430 (2005), accessed December 11, 2019. doi:10.4018/978-1-59140-553-5.ch251
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Inclusion Dependencies
Laura C. Rivero (Universidad Nacional del Centro de la Provincia de Buenos Aires, Argentina and Universidad Nacional de La Plata, Buenos Aires, Argentina)
Source Title:
Encyclopedia of Information Science and Technology, First Edition
Copyright:
© 2005
|
Pages:
6
DOI:
10.4018/978-1-59140-553-5.ch251
OnDemand PDF Download:
$37.50
Abstract
Inclusion dependencies support an essential semantics of the standard relational data model. An inclusion dependency is defined as the existence of attributes (the left term) in a table R whose values must be a subset of the values of the corresponding attributes (the right term) in another table S (Abiteboul, Hull & Vianu, 1995; Codd, 1990; Connolly, Begg & Strachan, 1999; Date, 2000). When the right term conforms a unique column or a primary key (K) for the table S, the inclusion dependency is key-based (also named referential integrity restriction, rir). In this case, the left term is a foreign key (FK) in R and the restriction is stated as R[FK] <
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