5 search results - page 1 / 1 » PIVOT and UNPIVOT: Optimization and Execution Strategies in ... |
VLDB
2004
ACM
13 years 10 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
2005
IEEE
14 years 6 months ago
2005
IEEE
Data warehousing and on-line analytical processing (OLAP) are essential for decision support applications. Common OLAP operations include for example drill down, roll up, pivot an...
SIGMOD
2008
ACM
14 years 5 months ago
2008
ACM
Today's query processing engines do not take advantage of the multiple occurrences of a relation in a query to improve performance. Instead, each instance is treated as a dis...
SARA
2009
Springer
13 years 9 months ago
2009
Springer
An important challenge in constraint programming is to rewrite constraint models into executable programs calculating the solutions. This phase of constraint processing may requir...
SIGMOD
2007
ACM
14 years 5 months ago
2007
ACM
A lot of research has been conducted by the database community on methods and techniques for efficient XPath processing, with great success. Despite the progress made, significant...