654 search results - page 39 / 131 » Complexity of Answering Queries Using Materialized Views |
SIGMOD
2004
ACM
14 years 8 months ago
2004
ACM
The rapid adoption of XML as the standard for data representation and exchange foreshadows a massive increase in the amounts of XML data collected, maintained, and queried over th...
VLDB
2007
ACM
14 years 8 months ago
2007
ACM
As more sensitive data is captured in electronic form, security becomes more and more important. Data encryption is the main technique for achieving security. While in the past en...
SIGMOD
2007
ACM
14 years 8 months ago
2007
ACM
Good cardinality estimates are critical for generating good execution plans during query optimization. Complex predicates, correlations between columns, and user-defined functions...
ICDT
2010
ACM
14 years 5 months ago
2010
ACM
The work reported here lays the foundations of data exchange in the presence of probabilistic data. This requires rethinking the very basic concepts of traditional data exchange, ...
DEXA
2000
Springer
14 years 3 days ago
2000
Springer
This paper is mainly concerned with the extension of database management systems querying capabilities, so that users may address queries involving preferences and get discriminate...