Showing papers on "Data warehouse published in 1969"

Elements of Data Management Systems

Abstract: Many different data management techniques have been designed, described in the literature, and marketed. With each teehmque there are claims of added flexiblhty and speed. However, because new terms are invented to describe each new technique, the observer is left m a state of confusion when he tries to understand how they work. A description is given oi the basic types of data management techniques, as well as the relation of each to the hardware on which it is used. Then it is shown how these basic elements can be used as building blocks to describe and build more complex data management systems. Finally, there is a discussion of the languages used for programming data management systems.

Data Migration Model and Algorithm between Heterogeneous Databases based on Web Service

Abstract: To solve the problems of data conversion between heterogeneous databases that arising from the progress of data migration, the paper presents an improved model of data migration and a data conversion algorithm based on the research on data synchronization via web service. The data migration model is divided into legacy data tier, middle tier and target data tier, which respectively provides data extracting, data converting and data loading functions. By establishing the corresponding relationships of different data fields between heterogeneous legacy database and target database, the data conversion algorithm converts data formats of legacy database into required data formats of target database according to the relationships, then writes the converted XML document to target database to achieve data migration. Experiments show that the model and algorithm can effectively realize data migration