995 search results - page 7 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
One of the critical deficiencies of SQL is lack of support for ndimensional array-based computations which are frequent in OLAP environments. Relational OLAP (ROLAP) applications ...
VLDB
1992
ACM
13 years 11 months ago
1992
ACM
In this paper, we discuss issues involving temporal data fragmentation, temporal query processing, and query optimization in multiprocessor database machines. We propose parallel ...
ICDT
1995
ACM
13 years 11 months ago
1995
ACM
We investigate and compare two forms of recursion on sets for querying nested collections. The rst one is called sri and it corresponds to sequential processing of data. The second...
BTW
2003
Springer
14 years 21 days ago
2003
Springer
Abstract: Optimization of nested queries, in particular finding equivalent “flattened” queries for queries that employ the SQL sub-query construct, has been researched extensiv...
VLDB
2004
ACM
14 years 24 days ago
2004
ACM
Query containment is the most fundamental relationship between a pair of database queries: a query Q is said to be contained in a query Q if the answer for Q is always a subset of...