116 search results - page 14 / 24 » Database querying under changing preferences |
IAJIT
2010
13 years 6 months ago
2010
: A broad variety of data is available in distinct heterogeneous sources, stored under different formats: database formats (in relational and object-oriented models), document form...
SIGMOD
2007
ACM
14 years 7 months ago
2007
ACM
Accurate cardinality estimation is critically important to high-quality query optimization. It is well known that conventional cardinality estimation based on histograms or simila...
ICDE
2002
IEEE
14 years 13 days ago
2002
IEEE
Soon, much of the data exchanged over the Internet will be encoded in XML, allowing for sophisticated filtering and content-based routing. We have built a filtering engine called ...
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
Most relational query optimizers make use of information about the costs of accessing tuples and data structures on various storage devices. This information can at times be off b...
ICDE
2011
IEEE
12 years 11 months ago
2011
IEEE
— Real-world databases often have extremely complex schemas. With thousands of entity types and relationships, each with a hundred or so attributes, it is extremely difficult fo...