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SIGMOD
1999
ACM
101views Database» more  SIGMOD 1999»
14 years 27 days ago
Join Synopses for Approximate Query Answering
In large data warehousing environments, it is often advantageous to provide fast, approximate answers to complex aggregate queries based on statistical summaries of the full data....
Swarup Acharya, Phillip B. Gibbons, Viswanath Poos...
IJCAI
2007
13 years 10 months ago
Conjunctive Query Answering for the Description Logic SHIQ
Conjunctive queries play an important role as an expressive query language for Description Logics (DLs). Although modern DLs usually provide for transitive roles, conjunctive quer...
Birte Glimm, Ian Horrocks, Carsten Lutz, Ulrike Sa...
FOIKS
2004
Springer
14 years 2 months ago
Query Answering and Containment for Regular Path Queries under Distortions
Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...
Gösta Grahne, Alex Thomo
SIGMOD
2006
ACM
121views Database» more  SIGMOD 2006»
14 years 2 months ago
Derby/S: a DBMS for sample-based query answering
Although approximate query processing is a prominent way to cope with the requirements of data analysis applications, current database systems do not provide integrated and compre...
Anja Klein, Rainer Gemulla, Philipp Rösch, Wo...
JAIR
2007
121views more  JAIR 2007»
13 years 8 months ago
On the Semantics of Logic Programs with Preferences
This work is a contribution to prioritized reasoning in logic programming in the presence of preference relations involving atoms. The technique, providing a new interpretation fo...
Sergio Greco, Irina Trubitsyna, Ester Zumpano