708 search results - page 20 / 142 » Optimizing SQL Queries over Text Databases |
VLDB
2002
ACM
13 years 7 months ago
2002
ACM
Complex database queries require the use of memory-intensive operators like sort and hashjoin. Those operators need memory, also referred to as SQL memory, to process their input ...
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...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
Despite the widespread and growing use of asynchronous copies to improve scalability, performance and availability, this practice still lacks a firm semantic foundation. Applicati...
COMAD
2008
13 years 9 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 7 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...