3678 search results - page 265 / 736 » Personalization of Queries in Database Systems |
168
click to vote
VLDB
2004
ACM
15 years 12 months ago
2004
ACM
The use of inaccurate or outdated database statistics by the query optimizer in a relational DBMS often results in a poor choice of query execution plans and hence unacceptably lo...
174
click to vote
WWW
2007
ACM
16 years 7 months ago
2007
ACM
As XML database sizes grow, the amount of space used for storing the data and auxiliary data structures becomes a major factor in query and update performance. This paper presents...
176
click to vote
PODS
2004
ACM
16 years 6 months ago
2004
ACM
Unions of conjunctive queries, also known as select-project-join-union queries, are the most frequently asked queries in relational database systems. These queries are definable b...
176
click to vote
EDBT
2004
ACM
15 years 12 months ago
2004
ACM
Abstract. We present a cost-based adaptive clustering method to improve average performance of spatial queries (intersection, containment, enclosure queries) over large collections...
187
click to vote
VLDB
1991
ACM
15 years 10 months ago
1991
ACM
Queries in object-oriented datab;Lqcs are formulated against a class and retrieve instnnccls of the class sat,isfying a certain predicate on the att,riblltes of the class. The pre...