1000 search results - page 23 / 200 » Provenance for Aggregate Queries |
ICDT
2009
ACM
14 years 10 months ago
2009
ACM
Graph-theoretic aggregation problems have been considered both in OLAP (grid graph) and XML (tree). This paper gives new results for MIN aggregation in a tree, where we want the M...
DAWAK
2003
Springer
14 years 3 months ago
2003
Springer
We introduce a new method for optimization of SQL queries with nested subqueries. The method is based on the idea of Boolean aggregates, aggregates that compute the conjunction or ...
SIGMOD
2005
ACM
14 years 10 months ago
2005
ACM
Window queries are proving essential to data-stream processing. In this paper, we present an approach for evaluating sliding-window aggregate queries that reduces both space and c...
EUSFLAT
2001
13 years 11 months ago
2001
Flexible querying aims at expressing preferences inside queries instead of strict requirements. We consider ordinary relational databases and flexible querying calling on fuzzy se...
SIGMOD
2003
ACM
14 years 10 months ago
2003
ACM
Database queries often take the form of correlated SQL queries. Correlation refers to the use of values from the outer query block to compute the inner subquery. This is a conveni...