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DAWAK
1999
Springer
14 years 26 days ago
Heuristic Algorithms for Designing a Data Warehouse with SPJ Views
A Data Warehouse DW can be abstractly seen as a set of materialized views de ned over relations that are stored in distributed heterogeneous databases. The selection of views for...
Spyros Ligoudistianos, Timos K. Sellis, Dimitri Th...
CORR
2008
Springer
113views Education» more  CORR 2008»
13 years 8 months ago
Expressing OLAP operators with the TAX XML algebra
With the rise of XML as a standard for representing business data, XML data warehouses appear as suitable solutions for Web-based decision-support applications. In this context, i...
Marouane Hachicha, Hadj Mahboubi, Jérô...
TKDE
2002
133views more  TKDE 2002»
13 years 8 months ago
ImageMap: An Image Indexing Method Based on Spatial Similarity
We introduce ImageMap, as a method for indexing and similarity searching in Image DataBases (IDBs). ImageMap answers "queries by example", involving any number of object...
Euripides G. M. Petrakis, Christos Faloutsos, King...
BTW
2009
Springer
132views Database» more  BTW 2009»
14 years 1 months ago
A Bayesian Approach to Estimating the Selectivity of Conjunctive Predicates
: Cost-based optimizers in relational databases make use of data statistics to estimate intermediate result cardinalities. Those cardinalities are needed to estimate access plan co...
M. Heimel, Volker Markl, Keshava Murthy
CIKM
2008
Springer
13 years 10 months ago
SQL extension for exploring multiple tables
The standard SQL assumes that the users are aware of all tables and their schemas to write queries. This assumption may be valid when the users deal with a relatively small number...
Sung Jin Kim, Junghoo John Cho