Design of desirable relational database schemes

Design of Desirable Relational Database Schemes

We define extended conflict free dependencies in the context of functional and multivalued dependencies; and prove that there exists an acyclic, dependency preserving, 4NF database scheme if and only if the given set of dependencies has an extended conflict free cover. This condition can be checked in polynomial time. A polynomial time algorithm to obtain such a scheme for a given extended conf...

Comprehensive Approach to the Design of Relational Database Schemes

We propose a new approach to the design of relational database schemes. The main features of the approach are: (4 A combination of the traditional decomposition and synthesis approaches, thus allowing the use of both functional and multivalued dependencies. (b) Separation of structural dependencies relevant for the design process from integrity constraints, i.e., constraints that do not bear an...

Relational Database Schemes and SAS Software SQL Solutions

A logical data model should do more than help a DBA protect the integrity of a database; it should also make life easier for programmers. A scheme such as that displayed in a simple E-R diagram can serve as a map that a programmer can use to navigate through a database. Primary and foreign keys can represent different entities and their interactions in the real world. Integrity constraints buil...

Relational database design with microcomputer applications

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Relational Database Applications in Manufacturing System Design