549 search results - page 1 / 110 » Data Expiration and Aggregate Queries |
AMW
2009
13 years 5 months ago
2009
We investigate the space requirements for summaries needed for maintaining exact answers to aggregate queries over histories of relational databases. We show that, in general, a su...
TKDE
2012
11 years 7 months ago
2012
—Continuous queries are used to monitor changes to time varying data and to provide results useful for online decision making. Typically a user desires to obtain the value of som...
QEST
2006
IEEE
13 years 10 months ago
2006
IEEE
One of the fundamental decisions in content networks is how the information about the existing contents is deployed and accessed. In particular, in many content network architectu...
ICDE
2009
IEEE
14 years 6 months ago
2009
IEEE
In recent years, the data management community has begun to consider situations in which data access is closely tied to network routing and distributed acquisition: examples includ...
ICDE
2012
IEEE
11 years 7 months ago
2012
IEEE
— Uncertainties in data arise for a number of reasons: when the data set is incomplete, contains conflicting information or has been deliberately perturbed or coarsened to remov...