Component Technology And Information Systems Of Multiple Data Sources Integrated Research And Implementation

Owing to history and technology, most databases on the Internet/Intranet are distributed and heterogeneous. Sometimes The huge relevant information in those databases should be managed unitedly,, So, it is getting more and more critical to develop applications for building systems that combine relevant data from database sources and present them in a form which is comprehensible for usersBeginning with the basic theory of module and distributed multidatabase, this Paper discusses the technologies about the EJB, CORBA component used in the Oracle8i/9i database , the Schema Integration and Query Decomposition,, Schema Integration and Query Decomposition are key segment of this thesis. They are kernel knowledge of distributed multidatabase too0 Then, based on a reasonable classified frame of Schema collision , the paper probes into the strategies realizing Schema Integration and Query Decomposition using the good "low coupling, high cohesion" characteristics of component; And then, a improved model of federal database architecture is designed exerting the virtue of independence and assembly of component<,At last, I had completed the work of developing a demo for the integration of audit information systems with the helps of others, which proved that the improved model of federal database architecture ispracticalo...