549 search results - page 48 / 110 » Data Expiration and Aggregate Queries |
104
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SSDBM
2003
IEEE
15 years 5 months ago
2003
IEEE
In many application contexts, like statistical databases, scientific databases, query optimizers, OLAP, and so on, data are often summarized into synopses of aggregate values. Su...
113
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EDBT
2009
ACM
15 years 3 months ago
2009
ACM
In a database system, disclosure of confidential private data may occur if users can put together the answers of past queries. Traditional access control mechanisms cannot guard a...
ICDE
2007
IEEE
15 years 6 months ago
2007
IEEE
The ability to query data streams is of increasing importance and has been identified as a crucial element for modern organizations and agencies. This paper identifies a class o...
DGO
2003
15 years 1 months ago
2003
To query XML data over the Web, query engines need to be able to resolve semantic differences between heterogeneous attributes that are conceptually similar. This demo presents a ...
123
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DAWAK
2009
Springer
15 years 4 months ago
2009
Springer
Abstract. In the last years, extending OLAP (On-Line Analytical Processing) systems with spatial and temporal features has attracted the attention of of the GIS (Geographic Informa...