Abstract: Data synchronization is a key technology with distributed environment that each node keep data consistency of the database approach. This article for Oracle multidatabase application environment, proposes a similar facade for enterpriselevel database synchronization technology. It describes the basic working principle of transaction synchronization under distributed database, from database links, synonyms to transaction synchronization. In practice projects, it shows that a distributed database transaction based on facade is feasibility of the application and has good features.

Key words: facade, distributed database, transaction synchronization, synonym, database link