Functional dependencies in relations with null values
type: Item
instance of: scholarly article
title: Functional dependencies in relations with null values
zbMATH Open document ID: 0544.68067
DOI: 10.1016/0020-0190(84)90117-0
author: Paolo Atzeni
author: Nicola M. Morfuni
published in: Information Processing Letters
publication date: 1984-01-01T00:00:00Z
review text: Database dependencies with incomplete information are considered: null values under the no-information interpretation are allowed in the relations, possibly requiring a subset of the relation to be null-free. The definition of functional dependency, the most common integrity constraint for relations without null values, is extended to the new framework, coherently with its motivations. A sound and complete set of inference rules is presented for the implication of functional dependencies.
Mathematics Subject Classification ID: 68P20
Mathematics Subject Classification ID: 68P05
zbMATH DE Number: 3866614
zbMATH Keywords: relational database
zbMATH Keywords: data dependencies
zbMATH Keywords: axiomatization
zbMATH Keywords: incomplete information
zbMATH Keywords: null values
zbMATH Keywords: inference rules
zbMATH Keywords: functional dependencies
MaRDI profile type: Publication
full work available at URL: 0020-0190(84)90117-0
OpenAlex ID: W2075276099
Wikidata QID: Q114685342
cites work: Q4050122
cites work: A relational model of data for large shared data banks
cites work: On the Equivalence of Database Models
cites work: Q3347338
cites work: A statistical approach to incomplete information in database systems
description: scientific article; zbMATH DE number 3866614