ER
2001
Springer
14 years 4 months ago
2001
Springer
A Data Warehouse (DW) can be used to integrate data from multiple distributed data sources. A DW can be seen as a set of materialized views that determine its schema and its conten...
DAWAK
2001
Springer
14 years 4 months ago
2001
Springer
The development of techniques for supporting incremental maintenance of materialized views has been an active research area for over twenty years. However, although there has been ...
CIKM
2009
Springer
14 years 4 months ago
2009
Springer
Answering queries using views is a well-established technique in databases. In this context, two outstanding problems can be formulated. The first one consists in deciding whethe...
DEXAW
2002
IEEE
14 years 4 months ago
2002
IEEE
In collaborative e-commerce environments, interoperation is a prerequisite for data warehouses that are physically scattered along the value chain. Adopting system and information...
APWEB
2004
Springer
14 years 5 months ago
2004
Springer
Queries to data warehouses often involve hundreds of complex aggregations over large volumes of data, and so it is infeasible to compute these queries by scanning the data sources ...
ADBIS
2006
Springer
14 years 5 months ago
2006
Springer
In many information systems, the databases that make up the system are distributed in different modules or branch offices according to the requirements of the business enterprise. ...
ADBIS
2006
Springer
14 years 5 months ago
2006
Springer
In existing systems, user transactions get blocked during materialized view creation and non-trivial database schema transformations. Blocking user transactions is not an option in...
ICDIM
2008
IEEE
14 years 6 months ago
2008
IEEE
Database Management Systems (DBMS) are complex software systems which are used in an increasing number of applications. To obtain the best performance for business relevant applic...
DOLAP
2009
ACM
14 years 6 months ago
2009
ACM
In this paper, we investigate the problem of answering top-k queries via materialized views. We provide theoretical guarantees for the adequacy of a view to answer a top-k query, ...
XSYM
2009
Springer
14 years 6 months ago
2009
Springer
Physical structures, for example indexes and materialized views, can improve query execution performance by orders of magnitude. Hence, it is important to choose the right configu...