383 search results - page 12 / 77 » Join operations in temporal databases |
SSDBM
2005
IEEE
15 years 3 months ago
2005
IEEE
To discover knowledge or retrieve information from a relational database, a user often needs to find objects related to certain source objects. There are two main challenges in b...
PODS
1999
ACM
15 years 1 months ago
1999
ACM
One of the most important types of query processing in spatial databases and geographic information systems is the spatial join, an operation that selects, from two relations, all...
PODS
2005
ACM
15 years 9 months ago
2005
ACM
We show that any expression of the relational division operator in the relational algebra with union, difference, projection, selection, constant-tagging, and joins, must produce ...
181
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GIS
2006
ACM
15 years 10 months ago
2006
ACM
The result of a distance join operation on two sets of objects R, S on a spatial network G is a set P of object pairs <p, q>, p R, q S such that the distance of an object ...
117
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SSDBM
2003
IEEE
15 years 2 months ago
2003
IEEE
The widespread use of sensor networks presents revolutionary opportunities for life and environmental science applications. Many of these applications involve continuous queries t...