3891 search results - page 34 / 779 » Query Models |
SERA
2005
Springer
14 years 3 months ago
2005
Springer
This paper shows the feasibility of SQL/MDR development. Previous approach has several problems such as complicated exchanging mechanism, dependent description to local MDR system...
VLDB
2004
ACM
14 years 3 months ago
2004
ACM
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...
ICDE
2007
IEEE
14 years 11 months ago
2007
IEEE
We demonstrate MMS, a system for storing and managing a variety of metadata in a simple, elegant and uniform way. The system is based on two observations. First, that the relation...
WWW
2002
ACM
14 years 10 months ago
2002
ACM
Query expansion has long been suggested as an effective way to resolve the short query and word mismatching problems. A number of query expansion methods have been proposed in tra...
ICDE
2007
IEEE
14 years 4 months ago
2007
IEEE
Most database query optimizers use cost models to identify good query execution plans. Inaccuracies in the cost models can cause query optimizers to select poor plans. In this pap...