272 search results - page 11 / 55 » SQL Queries Over Unstructured Text Databases |
SIGMOD
2005
ACM
14 years 8 days ago
2005
ACM
Appropriately selected materialized views (also called indexed views) can speed up query execution by orders of magnitude. Most database systems limit support for materialized vie...
VLDB
2009
ACM
14 years 7 months ago
2009
ACM
We consider the problem of using sampling to estimate the result of an aggregation operation over a subset-based SQL query, where a subquery is correlated to an outer query by a NO...
COMAD
2008
13 years 8 months ago
2008
In existing database systems there is a strong need for searching data according to many attributes. In commercial database platforms, the standard search over multiple attributes...
SIGMOD
2006
ACM
14 years 6 months ago
2006
ACM
Integration systems typically support only a restricted set of queries over the schema they export. The reason is that the participating information sources contribute limited con...
VLDB
1997
ACM
13 years 11 months ago
1997
ACM
In this paper we describe novel techniques that make it possible to build an industrial-strength tool for automating the choice of indexes in the physical design of a SQL database...