Functional dependencies in relations with null values

DOI10.1016/0020-0190(84)90117-0zbMath0544.68067OpenAlexW2075276099WikidataQ114685342 ScholiaQ114685342MaRDI QIDQ797002

Nicola M. Morfuni, Paolo Atzeni

Publication date: 1984

Published in: Information Processing Letters (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/0020-0190(84)90117-0

zbMATH Keywords

relational databaseincomplete informationaxiomatizationfunctional dependenciesinference rulesdata dependenciesnull values

Mathematics Subject Classification ID

Data structures (68P05) Information storage and retrieval of data (68P20)

Related Items (4)

Fuzzy functional dependencies and independencies in extended fuzzy relational database models ⋮ Null values in nested relational databases ⋮ Lossless outer joins with incomplete information ⋮ Inclusion dependencies and their interaction with functional dependencies in SQL

Cites Work

• On the Equivalence of Database Models
• A statistical approach to incomplete information in database systems
• A relational model of data for large shared data banks
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