Integration and querying of distributed databases

摘要

In large corporations today, there exist multiple, heterogeneous, distributed database systems. These systems are of different types and supported by different vendors. It is desirable to have a system whereby a user can query any of the databases through one interface. This kind of system could be used as a tool to import data from various types of databases into one common database or simply to extract information without knowing the intricacies of querying in the vendor-specific data manipulation language. This paper presents the development of such a system, called Integrated Database Query System. The proposed architecture is simple and cost effective.