272 search results - page 42 / 55 » SQL Queries Over Unstructured Text Databases |
SIGMOD
2001
ACM
14 years 7 months ago
2001
ACM
The bit-sliced index (BSI) was originally defined in [ONQ97]. The current paper introduces the concept of BSI arithmetic. For any two BSI's X and Y on a table T, we show how ...
VLDB
1994
ACM
13 years 11 months ago
1994
ACM
A new type of optimization, called predicate move-around, ia introduced. It is shown how this optimization `considerably improvea the efficiency of evaluating SQL queries that hav...
SIGMOD
1997
ACM
13 years 11 months ago
1997
ACM
A range query applies an aggregation operation over all selected cells of an OLAP data cube where the selection is speci ed by providing ranges of values for numeric dimensions. W...
EDBT
2008
ACM
13 years 9 months ago
2008
ACM
The goal of the Semantic Web is to support semantic interoperability between applications exchanging data on the web. The idea heavily relies on data being made available in machi...
PVLDB
2010
13 years 5 months ago
2010
Ontology-based data access is a powerful form of extending database technology, where a classical extensional database (EDB) is enhanced by an ontology that generates new intensio...