2853 search results - page 91 / 571 » On the Efficiency of Provenance Queries |
270
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ICDE
2003
IEEE
16 years 7 months ago
2003
IEEE
Expressing complex OLAP queries using group-by, aggregation, and joins can be extremely difficult. As a result of this, many alternate ways of expressing such queries have been de...
140
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PVLDB
2008
15 years 5 months ago
2008
We study the efficient evaluation of top-k queries over data items, where the score of each item is dynamically computed by applying an item-specific function whose parameter valu...
147
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VL
2009
IEEE
16 years 1 months ago
2009
IEEE
In many domains, decision makers want to find and understand patterns of events as these patterns often give insight into the causal relationships among events. Current systems to...
182
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WWW
2007
ACM
16 years 7 months ago
2007
ACM
Current web search engines focus on searching only the most recent snapshot of the web. In some cases, however, it would be desirable to search over collections that include many ...
163
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TCC
2009
Springer
16 years 6 months ago
2009
Springer
We consider the problem of memory checking, where a user wants to maintain a large database on a remote server but has only limited local storage. The user wants to use the small ...