902 search results - page 49 / 181 » Efficient and Extensible Algorithms for Multi Query Optimiza... |
144
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SIGMOD
2004
ACM
16 years 2 months ago
2004
ACM
Existing SQL aggregate functions present important limitations to compute percentages. This article proposes two SQL aggregate functions to compute percentages addressing such lim...
245
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ICDE
1996
IEEE
16 years 3 months ago
1996
IEEE
This paper presents a difference calculus for determining changes to rule conditions in an active DBMS. The calculus has been used for implementing an algorithm to efficiently mon...
94
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WWW
2006
ACM
16 years 3 months ago
2006
ACM
Current web search engines are retrospective in that they limit users to searches against already existing pages. Prospective search engines, on the other hand, allow users to upl...
125
Voted
COOPIS
2002
IEEE
15 years 7 months ago
2002
IEEE
: This work investigates the integration of heterogeneous resources, such as data and programs, in a fully distributed peer-to-peer mediation architecture. The challenge in making ...
119
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ICDCS
2009
IEEE
15 years 11 months ago
2009
IEEE
In this paper, we study the problem of indexing multidimensional data in the P2P networks based on distributed hash tables (DHTs). We identify several design issues and propose a ...