389 search results - page 23 / 78 » A Framework for the Investigation of Aggregate Functions in ... |
SIGMOD
2009
ACM
14 years 7 months ago
2009
ACM
In order to enable extensibility, modern query optimizers typically leverage a transformation rule based framework. Testing individual rule correctness as well as correctness of r...
ICDE
2006
IEEE
14 years 8 months ago
2006
IEEE
A top-k query combines different rankings of the same set of objects and returns the k objects with the highest combined score according to an aggregate function. We bring to ligh...
VLDB
2005
ACM
14 years 7 days ago
2005
ACM
Emerging large-scale monitoring applications require continuous tracking of complex dataanalysis queries over collections of physicallydistributed streams. Effective solutions hav...
HIM
1997
Springer
13 years 11 months ago
1997
Springer
Classical retrieval models support content-oriented searching for documents using a set of words as data model. However, in hypertext and database applications we want to consider...
ICDT
2010
ACM
13 years 8 months ago
2010
ACM
When a query is evaluated under bag semantics, each answer is returned as many times as it has derivations. Bag semantics has long been recognized as important, especially when ag...