Sciweavers

1000 search results - page 106 / 200
» Provenance for Aggregate Queries
Sort
View
SCCC
2005
IEEE
14 years 3 months ago
Optimizing repair programs for consistent query answering
Databases may not satisfy integrity constraints (ICs) for several reasons. Nevertheless, in most of the cases an important part of the data is still consistent wrt certain desired...
Mónica Caniupán Marileo, Leopoldo E....
EDBT
2009
ACM
131views Database» more  EDBT 2009»
14 years 1 months ago
Sample synopses for approximate answering of group-by queries
With the amount of data in current data warehouse databases growing steadily, random sampling is continuously gaining in importance. In particular, interactive analyses of large d...
Philipp Rösch, Wolfgang Lehner
SIGMOD
2001
ACM
147views Database» more  SIGMOD 2001»
14 years 10 months ago
Optimizing Queries Using Materialized Views: A practical, scalable solution
Materialized views can provide massive improvements in query processing time, especially for aggregation queries over large tables. To realize this potential, the query optimizer ...
Jonathan Goldstein, Per-Åke Larson
PODS
2005
ACM
128views Database» more  PODS 2005»
14 years 10 months ago
Operator placement for in-network stream query processing
In sensor networks, data acquisition frequently takes place at lowcapability devices. The acquired data is then transmitted through a hierarchy of nodes having progressively incre...
Utkarsh Srivastava, Kamesh Munagala, Jennifer Wido...
ISR
2011
13 years 5 months ago
REQUEST: A Query Language for Customizing Recommendations
Initially popularized by Amazon.com, recommendation technologies have become widespread over the past several years. However, the types of recommendations available to the users i...
Gediminas Adomavicius, Alexander Tuzhilin, Rong Zh...