Fundamentals & Concepts of Distributed Database`

This paper is prepared with the objective to present an introduction to distributed databases through its two main parts: The first part, is about the fundamentals of distributed databases (DDBS). The Points discussed in this part is related to the motivations of DDBS, architecture, design, features & function, Pros & Cons, etc. In the second part, we include some of the research that has been done in this specific area of DDBS. The topics of this research include, query optimization, distribution optimization, fragmentation, optimization, and join optimization on the net. Some of the examples and results are been provided to demonstrate the topics we are presenting.