Titlebook: Statistical and Scientific Database Management; Fifth International Zbigniew Michalewicz Conference proceedings 1990 Springer-Verlag Berli

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0302-9743 mplementational issues for scientific databases, temporal summary table management, graphical and visual interfaces, query optimization, distributed databases, and economic and geographical databases.978-3-540-52342-0978-3-540-46968-1Series ISSN 0302-9743 Series E-ISSN 1611-3349

AWL

The implementation of area and membership retrievals in point geography using SQL,ent retrievals for arbitrary geographical areas are achieved through the use of a regular tessellation overlay (grid-squares) as an intermediate step..Output from the system is as a display of a classified table of rates, or as a file of records (for each aggregate area and sub-group) for further analysis in a statistical package.

易发怒

A framework for query optimization in temporal databases,of temporal joins— theta-join, time intersection, time union and the event-join. Factors that affect processing strategies are discussed, especially the problem of estimating data selectivity for various temporal operations. Strategies for implementing the temporal equijoin operator is evaluated.

诽谤

Conference proceedings 1990m builders, to discuss the particular issues of interest and to propose new solutions to the problems of the area, both from the theoretical and from the application point of view. This proceedings volume contains three invited papers as well as the other 13 contributions. The papers cover a wide ar

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helper-T-cells