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» Aggregates in Possibilistic Databases
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WAIM
2010
Springer
13 years 8 months ago
V Locking Protocol for Materialized Aggregate Join Views on B-Tree Indices
Immediate materialized view maintenance with transactional consistency is highly desirable to support real-time decision making. Nevertheless, due to high deadlock rates, such main...
Gang Luo
SIGMOD
2008
ACM
139views Database» more  SIGMOD 2008»
14 years 10 months ago
SQAK: doing more with keywords
Today's enterprise databases are large and complex, often relating hundreds of entities. Enabling ordinary users to query such databases and derive value from them has been o...
Sandeep Tata, Guy M. Lohman
GIS
2008
ACM
14 years 11 months ago
Detecting basic topological changes in sensor networks by local aggregation
Wireless sensor networks (WSNs) can provide real-time information about geospatial environments, and so have the potential to play an important role in the monitoring of geographi...
Jixiang Jiang, Michael F. Worboys
SIGMOD
2008
ACM
206views Database» more  SIGMOD 2008»
14 years 10 months ago
Ad-hoc aggregations of ranked lists in the presence of hierarchies
A variety of web sites and web based services produce textual lists at varying time granularities ranked according to several criteria. For example, Google Trends produces lists o...
Nilesh Bansal, Sudipto Guha, Nick Koudas
SIGMOD
1999
ACM
181views Database» more  SIGMOD 1999»
14 years 2 months ago
Approximate Computation of Multidimensional Aggregates of Sparse Data Using Wavelets
Computing multidimensional aggregates in high dimensions is a performance bottleneck for many OLAP applications. Obtaining the exact answer to an aggregation query can be prohibit...
Jeffrey Scott Vitter, Min Wang