Towards a sound view integration methodology
Marco A. Casanova, Vânia Maria Ponte Vidal · 1983
View integration is investigated with the help of three classes of interrelational dependencies, inclusion dependencies, exclusion dependencies and union functional dependencies. The process of view integration is divided into two steps, combination and optimization. View combination consists in defining new interrelational dependencies that capture similarities between different views. The optimization step tries to reduce redundancy and the size of the schema. Finally, general results about interrelational dependencies are presented that lead to an optimization procedure for a restricted class of schemas.