168 search results - page 21 / 34 » Efficient Creation of Statistics over Query Expressions |
ICDE
2010
IEEE
14 years 7 months ago
2010
IEEE
Estimation via sampling out of highly selective join queries is well known to be problematic, most notably in online aggregation. Without goal-directed sampling strategies, samples...
SIGMOD
2006
ACM
14 years 7 months ago
2006
ACM
Text is ubiquitous and, not surprisingly, many important applications rely on textual data for a variety of tasks. As a notable example, information extraction applications derive...
CORR
2008
Springer
13 years 7 months ago
2008
Springer
Transmission over wireless fading channels under quality of service (QoS) constraints is studied when only the receiver has channel side information. Being unaware of the channel c...
KDID
2004
13 years 9 months ago
2004
Abstract. Database systems are islands of structure in a sea of unstructured data sources. Several real-world applications now need to create bridges for smooth integration of semi...
ICDE
1998
IEEE
14 years 9 months ago
1998
IEEE
Discovery of functionaldependencies from relations has been identified as an important database analysis technique. In this paper, we present a new approach for finding functional...