1127 search results - page 135 / 226 » Perspectives and Complex Aggregates |
ICDE
2006
IEEE
14 years 11 months ago
2006
IEEE
We present MiniCount, the first efficient sound and complete algorithm for finding maximally contained rewritings of conjunctive queries with count, using conjunctive views with c...
ICDE
2005
IEEE
14 years 11 months ago
2005
IEEE
Efficient one-pass computation of F0, the number of distinct elements in a data stream, is a fundamental problem arising in various contexts in databases and networking. We consid...
ICDE
1999
IEEE
14 years 11 months ago
1999
IEEE
Range sum queries on data cubes are a powerful tool for analysis. A range sum query applies an aggregation operation (e.g., SUM) over all selected cells in a data cube, where the ...
GIS
2009
ACM
14 years 11 months ago
2009
ACM
Many popular online services provide "local" or "yellow-pages" search, but none of them allow users to customize the search over user-specified data. Instead, ...
ICDT
2009
ACM
14 years 11 months ago
2009
ACM
Partitioning is an important step in several database algorithms, including sorting, aggregation, and joins. Partitioning is also fundamental for dividing work into equal-sized (o...