41 search results - page 3 / 9 » A Temporal Query Language for OLAP: Implementation and a Cas... |
ARTS
1997
Springer
13 years 11 months ago
1997
Springer
We introduce PLC-Automata as a new class of automata which are tailored to deal with real-time properties of Programmable Logic Controllers (PLCs). These devices are often used in...
DBPL
1993
Springer
13 years 11 months ago
1993
Springer
In this paper we study the expressive power of query languages for nested bags. We de ne the ambient bag language by generalizing the constructs of the relational language of Brea...
EDBT
2000
ACM
13 years 11 months ago
2000
ACM
OLAP applications use precomputation of aggregate data to improve query response time. While this problem has been well-studied in the recent database literature, to our knowledge ...
ICDE
1998
IEEE
14 years 9 months ago
1998
IEEE
Algebraic transformation and optimization techniques have been the method of choice in relational query execution, but applying them in OODBMS is difficult due to the complexity o...
DBKDA
2009
IEEE
13 years 10 months ago
2009
IEEE
Software systems in health care, such as disease and medical-record management, or financial applications, such as customer relationship and portfolio management, have very often...