The novel concept of data synchronization object is used in Lite/2, a prototype of the mobile database system, to define a transactional synchronization method and is able to maintain the semantic integrity.

The implement method of distributed database s synchronous updating;

Study on mechanism of synchronous updating for railway public basic coding based on Web services;

Firstly this paper introduces a drawing method based on the SDI application and the implementation of the split windows’ synchronous update,and then it expatiates how to improve the update efficiency of split windows step by step by an instance.

This paper provides a discussion on the theory of distributed database, and then puts forward a synchronous update system model to solve the problems encountered while Lushun Insurance Company was realizing the data share among different kind of databases located in different area.