Schema versioning provides a mechanism for handling change in the structure of database systems and has been investigated widely, both in the context of static and temporal databases. With the growing interest in spatial and spatio-temporal data as well as the mechanisms for holding such data, the spatial context within which data is formatted also becomes an issue. This paper presents a genera...

A new issue that arises in modern applications involves the efficient manipulation of (static or moving) spatial objects, and the relationships among them. As a result, modern database systems should be able to efficiently support that type of data. Towards this goal, appropriate extensions of multidimensional access methods can be exploited in order to index and retrieve spatiotemporal objects...

The promises of network-accessible information are increasingly difficult to achieve. These difficulties are due to a variety of causes, such as, the rapid growth in the volume of network-available information and the increasing complexity, diversity and terminological fluctuations of the different information sources available. This paper presents a conceptual architecture for the organisation...

Intelligent products carrying their own information are more and more present nowadays. In recent years, some authors argued the usage of such products for the Supply Chain Management Industry. Indeed, a multitude of informational vectors take place in such environments like fixed databases or manufactured products on which we are able to embed significant proportion of data. By considering dis...

Object-oriented database management systems (OODBMS) are especially suited to model complex and highly dynamic application domains. In this paper, we propose a schema uersioning approach which supports the dynamic change of an objectoriented database schema while it is used by running applications. OUT mechanism allows to have applications working with diflerent schema weTsions on top of the sa...

This chapter investigates the affect of knowledge discovery from databases on the security of databases. First, it examines the current concern with database systems for security from knowl­ edge discovery. Second, this chapter discusses some of the potential security risks associated with knowledge discovery. Third, some potential structure for the development of controls for such systems is e...

As the evaluation of XQuery expressions in native XML database management systems is a complex task and offers several degrees of freedom, we propose a visual explanation tool—providing an easily understandable graphical representation of XQuery—for tracking the XQuery evaluation process from head to toe.

Data is most important in today’s world as it helps organizations as well as individuals to extract information and use it to make various decisions. Data are generally stored in database so that retrieving and maintaining it becomes easy and manageable. All the operations of data manipulation and maintenance are done using Database Management System. Considering the importance of data in organ...

Here it is presented an application that plans out travel on public transports and that chooses the best ones, according to preference criteria provided by the user. These criteria are: the time spent on the travel, the price of the tickets and the quality of the transports. The application combines different means of transport. Algorithms and heuristics were developed to draw up transport plan...

In the cancerology domain, we were brought to make periodic mammography images to monitor tumor patients. Oracle Database Management system (DBMS) is a solution to manage these images with patient's data recorder. Knowing the large size of medical images of mammograms, the Oracle DBMS saves these images outside the Oracle database using external LOBs. The link between these images and Oracle is...