713 search results - page 30 / 143 » A Learning Optimizer for a Federated Database Management Sys... |
ADBIS
2005
Springer
15 years 3 months ago
2005
Springer
Abstract. The performance of an information retrieval system is usually measured in terms of two different criteria, precision and recall. This way, the optimization of any of its...
108
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SIGMOD
2011
ACM
14 years 14 days ago
2011
ACM
An important means of allowing non-expert end-users to pose ad hoc queries — whether over single databases or data integration systems — is through keyword search. Given a set...
135
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CIDR
2009
14 years 10 months ago
2009
Recent excitement in the database community surrounding new applications--analytic, scientific, graph, geospatial, etc.--has led to an explosion in research on database storage sy...
SIGMOD
1999
ACM
15 years 1 months ago
1999
ACM
Pre-computation and materialization of views with aggregate functions is a common technique in Data Warehouses. Due to the complex structure of the warehouse and the different pro...
ICDE
2006
IEEE
15 years 3 months ago
2006
IEEE
The window query model is widely used in data stream management systems where the focus of a continuous query is limited to a set of the most recent tuples. In this dissertation, ...