12 search results - page 3 / 3 » Schur aggregation for linear systems and determinants |
SIGMOD
2007
ACM
14 years 5 months ago
2007
ACM
Sketching techniques can provide approximate answers to aggregate queries either for data-streaming or distributed computation. Small space summaries that have linearity propertie...
EDBT
2009
ACM
13 years 8 months ago
2009
ACM
In a database system, disclosure of confidential private data may occur if users can put together the answers of past queries. Traditional access control mechanisms cannot guard a...