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Further Analysis of the Entity-Relationship Approach to Database Design
January 1981 (vol. 7 no. 1)
pp. 85-99
P.A. Ng, Department of Computer Sciences, University of Missouri
The nondeterministic or deterministic entity-relationship model of a database is formaRy defined as a user's view of that database in terms of a collection of time-varying relations: the regular or weak entity relations, or the regular or weak relationship relations. Both nondeterministic and deterministic entity-relationship models have the same strength to characterize information concerning entities and relationships which exist in our minds. An improved table form of the relations is introduced to provide a clear and concise user's view of databases. The basic concept of the entity-relationship approach to the logical database design is provided, and is used to derive 3NF relations. FinaUly, a method of representing physicaly these relations, which are generated by the use of the entity-relationship approach to the logical database design, is presented. Thus, the entity-relationship approach to the logical and physical database design can also be realized.
Index Terms:
network models, Determinism and nondeterminism, entity-relationship approach, functional dependency, logical and physical database design, normal forms, relational, hierarchical
Citation:
P.A. Ng, "Further Analysis of the Entity-Relationship Approach to Database Design," IEEE Transactions on Software Engineering, vol. 7, no. 1, pp. 85-99, Jan. 1981, doi:10.1109/TSE.1981.234511
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