6654 search results - page 217 / 1331 » Querying Faceted Databases |
162
Voted
ICDT
2010
ACM
15 years 5 months ago
2010
ACM
When a query is evaluated under bag semantics, each answer is returned as many times as it has derivations. Bag semantics has long been recognized as important, especially when ag...
158
click to vote
CIDR
2007
15 years 5 months ago
2007
We present a “black-box” approach to estimating query cardinality that has no knowledge of query execution plans and data distribution, yet provides accurate estimates. It doe...
126
Voted
ICDE
2007
IEEE
15 years 7 months ago
2007
IEEE
In this paper, we propose a simple and flexible execution model that (i) supports a wide spectrum of alternative optimization and execution strategies and their mixtures, (ii) pro...
147
Voted
ADC
2007
Springer
15 years 10 months ago
2007
Springer
Structured Query Language (SQL) is the dominant language for querying relational databases today, and is an essential topic in introductory database courses in higher education. E...
116
click to vote
ADBIS
2005
Springer
15 years 9 months ago
2005
Springer
XQuery is widely used for querying XML documents. Within this paper, we examine optimization rules for XQuery queries that exploit type information of the input XML document given ...