Query optimization in distributed databases explicitly needed in many aspects of the
optimization process, often making it imperative for the optimizer to consult underlying data …

Abstract Query Optimization in Distributed Database Management System (DDBMS)
involving large number of relations with multiple joins has always been an attractive area of …

Distributed query processing has become essential in today's scenario to address the
changing business needs of users. It aims to arrive at an optimal query processing plan for a …

The distributed query optimization is one of the typical problems in distributed databases.
The success story of distributed database system depends on query optimization. In order to …

This research presents the main elements of query optimizations in distributed systems.
First, data architecture according with system level architecture in a distributed environment …

Distributed database query optimization is very important in business field. This paper
proposes an optimization based on genetic algorithm and immune theory. Distributed …

Processing a distributed query entails accessing data from multiple sites. The inter site
communication cost, being the dominant cost, needs to be reduced in order to improve the …

Query processing is a critical performance evaluation parameter and has received a
considerable amount of attention especially in the context of distributed database systems …

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 …

Query processing is an important concern in the field of distributed databases. The main
problem is: if a query can be decomposed into subqueries that require operations at …