620 search results - page 92 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
154
Voted
SIGMOD
2002
ACM
16 years 3 months ago
2002
ACM
Modern CPUs have instructions that allow basic operations to be performed on several data elements in parallel. These instructions are called SIMD instructions, since they apply a...
226
click to vote
ICDE
2005
IEEE
16 years 5 months ago
2005
IEEE
Efficient one-pass computation of F0, the number of distinct elements in a data stream, is a fundamental problem arising in various contexts in databases and networking. We consid...
130
click to vote
EDBT
2010
ACM
15 years 10 months ago
2010
ACM
This paper addresses a fundamental and challenging problem with broad applications: efficient processing of region-based promotion queries, i.e., to discover the top-k most inter...
198
Voted
SIGMOD
2008
ACM
16 years 3 months ago
2008
ACM
There has been a significant amount of excitement and recent work on column-oriented database systems ("column-stores"). These database systems have been shown to perfor...
137
Voted
MTA
2007
15 years 3 months ago
2007
Complex multimedia queries, aiming to retrieve from large databases those objects that best match the query specification, are usually processed by splitting them into a set of m ...