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VLDB
2007
ACM
124views Database» more  VLDB 2007»
15 years 10 months ago
Ad-hoc Top-k Query Answering for Data Streams
A top-k query retrieves the k highest scoring tuples from a data set with respect to a scoring function defined on the attributes of a tuple. The efficient evaluation of top-k q...
Gautam Das, Dimitrios Gunopulos, Nick Koudas, Niko...
SSDBM
2003
IEEE
83views Database» more  SSDBM 2003»
15 years 10 months ago
PiQA: An Algebra for Querying Protein Data Sets
Life science researchers frequently need to query large protein data sets in a variety of different ways. Protein data sets have a rich structure that includes its primary structu...
Sandeep Tata, Jignesh M. Patel
SIGMOD
1993
ACM
150views Database» more  SIGMOD 1993»
15 years 8 months ago
Predicate Migration: Optimizing Queries with Expensive Predicates
The traditional focus of relational query optimization schemes has been on the choice of join methods and join orders. Restrictions have typically been handled in query optimizers ...
Joseph M. Hellerstein, Michael Stonebraker
EDBT
2009
ACM
207views Database» more  EDBT 2009»
15 years 7 months ago
Evaluating probability threshold k-nearest-neighbor queries over uncertain data
In emerging applications such as location-based services, sensor monitoring and biological management systems, the values of the database items are naturally imprecise. For these ...
Reynold Cheng, Lei Chen 0002, Jinchuan Chen, Xike ...
ICSE
2008
IEEE-ACM
16 years 5 months ago
Answering conceptual queries with Ferret
Programmers seek to answer questions as they investigate the functioning of a software system, such as "which execution path is being taken in this case?" Programmers at...
Brian de Alwis, Gail C. Murphy