19 search results - page 2 / 4 » Performing Group-By before Join |
SSD
2007
Springer
13 years 10 months ago
2007
Springer
We address continuously processing an aggregation join query over data streams. Queries of this type involve both join and aggregation operations, with windows specified on join ...
ADC
2008
Springer
13 years 6 months ago
2008
Springer
In order to find all occurrences of a tree/twig pattern in an XML database, a number of holistic twig join algorithms have been proposed. However, most of these algorithms focus o...
CORR
2008
Springer
13 years 4 months ago
2008
Springer
A purely relational account of the true XQuery semantics can turn any relational database system into an XQuery processor. Compiling nested expressions of the fully compositional X...
DEBS
2003
ACM
13 years 9 months ago
2003
ACM
Join algorithms must be re-designed when processing stream data instead of persistently stored data. Data streams are potentially infinite and the query result is expected to be ...
DOLAP
2003
ACM
13 years 9 months ago
2003
ACM
Multidimensional aggregation queries constitute the single most important class of queries for data warehousing applications and decision support systems. The bottleneck in the ev...