Titlebook: ICDT ‘90; Third International Serge Abiteboul,Paris C. Kanellakis Conference proceedings 1990 Springer-Verlag Berlin Heidelberg 1990 Autom

预知

Exaggerate

Efficient algorithms for managing the history of evolving databases,g any past state of a database. This theoretical framework therefore reduces the problem concerning the history management of databases to the problem of efficiently managing the history of a set evolving in time. We present a dynamic algorithm that reconstructs the state of the set at a given time

antidote

Arresting

HALL

Removing redundancy and updating databases,rm (or some other normal form like Boyce-Codd Normal Form). This method of database design assumes that the real world satisfies very strong constraints like . (fds), without any exceptions..Most databases in “Whatever” Normal Form still contain a large amount of duplicated information, because the

想象

hegemony

A flexible and adaptable tool kit approach for concurrency control in non standard database systemshat address the concurrency control issues of ‘advanced database applications’ like, e. g., CAD/CAM, CASE, large AI applications or image and voice processing. The demands on concurrency control in such application areas differ substantially from those in traditional database applications; in partic

牢骚

节省

金盘是高原