2514 search results - page 158 / 503 » On the Computation of Approximations of Database Queries |
173
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CHI
1992
ACM
15 years 10 months ago
1992
ACM
We designed, implemented and evaluated a new concept for direct manipulation of databases, called dynamic queries, that allowsuserstoformulatequerieswithgraphicalwidgets,such as s...
192
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ITNG
2008
IEEE
16 years 28 days ago
2008
IEEE
With recent advances in wireless communication and position technologies, it became possible to collect and record trajectories of moving objects. Thus, many services in road netw...
375
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ICDE
2001
IEEE
16 years 7 months ago
2001
IEEE
We consider the problems of computing aggregation queries in temporal databases, and of maintaining materialized temporal aggregate views efficiently. The latter problem is partic...
164
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APWEB
2004
Springer
15 years 12 months ago
2004
Springer
Queries to data warehouses often involve hundreds of complex aggregations over large volumes of data, and so it is infeasible to compute these queries by scanning the data sources ...
280
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GIS
2003
ACM
16 years 7 months ago
2003
ACM
Advances in wireless communications, positioning technology, and other hardware technologies combine to enable a range of applications that use a mobile user's geo-spatial da...