2514 search results - page 270 / 503 » On the Computation of Approximations of Database Queries |
228
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EDBT
2006
ACM
16 years 6 months ago
2006
ACM
Abstract. Peer Data Management Systems (PDMS) have recently attracted attention by the database community. One of the main challenges of this paradigm is the development and evalua...
182
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SIGMOD
1996
ACM
15 years 11 months ago
1996
ACM
Decision support applications involve complex queries on very large databases. Since response times should be small, query optimization is critical. Users typically view the data ...
157
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ICDT
1995
ACM
15 years 10 months ago
1995
ACM
A tuple t1 of relation R subsumes tuple t2 of R, with respect to a query Q if for every database, tuple t1 derives all, and possibly more, answers to query Q than derived by tuple ...
146
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GIS
2010
ACM
15 years 5 months ago
2010
ACM
The growing popularity of online Earth visualization tools and geo-realistic games and the availability of high resolution terrain data have motivated a new class of queries to th...
409
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SIGMOD
2006
ACM
16 years 6 months ago
2006
ACM
Given a dataset P and a preference function f, a top-k query retrieves the k tuples in P with the highest scores according to f. Even though the problem is well-studied in convent...