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ADBIS
2004
Springer
224views Database» more  ADBIS 2004»
15 years 4 months ago
Using Ontologies for Database Query Reformulation
Abstract. Query reformulation techniques based on semantic knowledge have been used in two ways in database management systems, namely for query optimization and for data integrati...
Chokri Ben Necib, Johann Christoph Freytag
VLDB
2002
ACM
98views Database» more  VLDB 2002»
14 years 10 months ago
Processing Star Queries on Hierarchically-Clustered Fact Tables
Star queries are the most prevalent kind of queries in data warehousing, OLAP and business intelligence applications. Thus, there is an imperative need for efficiently processing ...
Nikos Karayannidis, Aris Tsois, Timos K. Sellis, R...
172
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SIGMOD
2009
ACM
258views Database» more  SIGMOD 2009»
15 years 11 months ago
Continuous obstructed nearest neighbor queries in spatial databases
In this paper, we study a novel form of continuous nearest neighbor queries in the presence of obstacles, namely continuous obstructed nearest neighbor (CONN) search. It considers...
Yunjun Gao, Baihua Zheng
SIGMOD
2005
ACM
145views Database» more  SIGMOD 2005»
15 years 11 months ago
Native Xquery processing in oracle XMLDB
With XQuery becoming the standard language for querying XML, and the relational SQL platform being recognized as an important platform to store and process XML, the SQL/XML standa...
Zhen Hua Liu, Muralidhar Krishnaprasad, Vikas Aror...
DOCENG
2004
ACM
15 years 4 months ago
Querying XML documents by dynamic shredding
With the wide adoption of XML as a standard data representation and exchange format, querying XML documents becomes increasingly important. However, relational database systems co...
Hui Zhang 0003, Frank Wm. Tompa