Research on Two-Level Database Design and Implementation Technique
两级数据库的设计和实现技术研究

Introduces a solution to construct a two-level database system,focus on database design,database synchronization and implementation technique.This solution supports double-direction replication,part replication between two-level database,supports replication between heterogeneous database systems,can handle variant type of data item and provides a(mecha-)(nism) to handle exception in synchronization.This solution is extensible,easy to use and applied in actual project.