Sciweavers

1000 search results - page 32 / 200
» Provenance for Aggregate Queries
Sort
View
DBPL
1997
Springer
87views Database» more  DBPL 1997»
14 years 2 months ago
Incremental Recomputation of Recursive Queries with Nested Sets and Aggregate Functions
We examine the power of incremental evaluation systems that use an SQL-like language for maintaining recursively-de ned views. We show that recursive queries such as transitive clo...
Leonid Libkin, Limsoon Wong
PODS
2008
ACM
170views Database» more  PODS 2008»
14 years 10 months ago
Answering aggregate queries in data exchange
Data exchange, also known as data translation, has been extensively investigated in recent years. One main direction of research has focused on the semantics and the complexity of...
Foto N. Afrati, Phokion G. Kolaitis
EDBT
2009
ACM
127views Database» more  EDBT 2009»
14 years 4 months ago
Answering aggregate keyword queries on relational databases using minimal group-bys
Keyword search has been recently extended to relational databases to retrieve information from text-rich attributes. However, all the existing methods focus on finding individual...
Bin Zhou 0002, Jian Pei
PET
2009
Springer
14 years 4 months ago
Privacy-Preserving Computation and Verification of Aggregate Queries on Outsourced Databases
: © Privacy-Preserving Computation and Verification of Aggregate Queries on Outsourced Databases Brian Thompson, Stuart Haber, William G. Horne, Tomas Sander, Danfeng Yao HP Labor...
Brian Thompson, Stuart Haber, William G. Horne, To...
SIGMOD
2008
ACM
193views Database» more  SIGMOD 2008»
14 years 10 months ago
ARCube: supporting ranking aggregate queries in partially materialized data cubes
Supporting ranking queries in database systems has been a popular research topic recently. However, there is a lack of study on supporting ranking queries in data warehouses where...
Tianyi Wu, Dong Xin, Jiawei Han