85 search results - page 2 / 17 » Answering queries over incomplete data stream histories |
ICEBE
2005
IEEE
13 years 10 months ago
2005
IEEE
Over a traditional Database Management System (DBMS), the answer to an aggregate query is usually much smaller than the answer to a similar nonaggregate query. Therefore, we call ...
VLDB
2007
ACM
14 years 5 months ago
2007
ACM
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...
DAMON
2008
Springer
13 years 6 months ago
2008
Springer
Frequent elements and top-k queries constitute an important class of queries for data stream analysis applications. Certain applications require answers for both frequent elements...
ICDE
2006
IEEE
14 years 6 months ago
2006
IEEE
We introduce a new domain-independent framework for formulating and efficiently evaluating similarity queries over historical data, where given a history as a sequence of timestam...
AMW
2009
13 years 6 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...