These methods are presented in the framework of a general query evaluation procedure
using the relational calculus representation of queries. In addition, nonstandard query …

In this paper, various techniques for optimizing queries in distributed databases are
presented. Although no attempt is made to cover all proposed algorithms on this topic, quite …

The first edition of this book appeared in 1991 when the technology was new and there were
not too many products. In the Preface to the first edition, we had quoted Michael Stonebraker …

Database Management Systems provides comprehensive and up-to-date coverage of the
fundamentals of database systems. Coherent explanations and practical examples have …

• Bases de datos relacionales (Capítulos 4 al 7). El Capítulo 4 se centra en el lenguaje
relacional orientado al usuario de mayor influencia: SQL. El Capítulo 5 cubre otros dos …

This chapter describes how statements in the SQL language are processed by the
R'distributed relational database management system. R'is an experimental adaptation of …

As the main factor in the distributed database systems, query optimization is aimed at finding
an optimal execution plan to reduce the runtime. In such systems, because of the repeated …

While a significant amount of research efforts has been reported on developing algorithms,
based on joins and semijoins, to tackle distributed query processing, there is relatively little …

Large amount of information available in distributed databases needs to be exploited by
organizations in order to be competitive in the market. In order to exploit this information …

The application of a combination of join and semi-join operations to minimize the amount of
data transmission required for distributed query processing is discussed. Specifically, two …