492 search results - page 51 / 99 » Computing aggregations in database query languages |
IEEECSA
2009
13 years 7 months ago
2009
- The SQL language allows users to express queries that have nested subqueries in them. Optimization of nested queries has received considerable attention over the last few years. ...
ICDT
2003
ACM
14 years 3 months ago
2003
ACM
All the languages for querying semistructured data and the web use as an integral part regular expressions. Based on practical observations, finding the paths that satisfy those r...
MIS
2004
Springer
14 years 3 months ago
2004
Springer
When similarity queries over multimedia databases are processed by splitting the overall query condition into a set of sub-queries, the problem of how to efficiently and effectiv...
SIGMOD
2010
ACM
13 years 8 months ago
2010
ACM
Continuous SPARQL (C-SPARQL) is a new language for continuous queries over streams of RDF data. CSPARQL queries consider windows, i.e., the most recent triples of such streams, ob...
CDB
2004
Springer
14 years 3 months ago
2004
Springer
Moving objects are currently represented in databases by means of an explicit representation of their trajectory. However from a physical point of view, or more specifically accor...