The Consequences of the Uniqueness Assumption for Relational Databases.
Technical rept. Apr 80-Mar 81,
WHARTON SCHOOL PHILADELPHIA PA DEPT OF DECISION SCIENCES
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Much of the work on relational databases that deals with data dependencies makes a uniqueness or universal relation assumption. It has been recognized that this assumption is problematic nevertheless it is necessary for the axiomatic approach taken in many papers on the theory of relational databases. We will describe the problem, investigate some of the solutions put forward and suggest a new solution. Many of the problems remain intractable within the realm of classical relational databases and restrictions must be placed on the use of FDs. An automated method is presented that searches for violations of the uniqueness assumption. Author
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