708 search results - page 123 / 142 » A Genetic Algorithm for Database Query Optimization |
PODS
2003
ACM
14 years 7 months ago
2003
ACM
Full disjunctions are an associative extension of the outerjoin operator to an arbitrary number of relations. Their main advantage is the ability to maximally combine data from di...
SIGMOD
2002
ACM
14 years 7 months ago
2002
ACM
The availability of summary data for XML documents has many applications, from providing users with quick feedback about their queries, to cost-based storage design and query opti...
ICDE
2005
IEEE
14 years 1 months ago
2005
IEEE
Queries on XML documents typically combine selections on element contents, and, via path expressions, the structural relationships between tagged elements. Efficient support for ...
SSD
2005
Springer
14 years 1 months ago
2005
Springer
This paper proposes and solves a-autonomy and k-stops shortest path problems in large spatial databases. Given a source s and a destination d, an aautonomy query retrieves a sequen...
TCS
1998
13 years 7 months ago
1998
We introduce a new constraint domain, aggregation constraints, that is useful in database query languages, and in constraint logic programming languages that incorporate aggregate...