Question
Consider the following relations in the relational schema of a Movies Database. The primary key of each relation is underlined. MOVIE(Title, Year, Language, Studio, DirectorName)
Consider the following relations in the relational schema of a Movies Database. The primary key of each relation is underlined.
MOVIE(Title, Year, Language, Studio, DirectorName) ACTOR(FullName, DateBorn, CountryBorn, DeathYear) perform(MTitle, MYear, AFullName, ADateBorn)
Adding the attribute #movies to ACTOR to have the number of movies in which each actor has participated,creates redundancy, explain how is this redundant.
Describe a mechanism that could be implemented to control this redundancy from producing inconsistencies.
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MFDBS 89 2nd Symposium On Mathematical Fundamentals Of Database Systems Visegrad Hungary June 26 30 1989 Proceedings
Authors: Janos Demetrovics ,Bernhard Thalheim
1989th Edition
3540512519, 978-3540512516
