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» Auditing SQL Queries
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CDB
2004
Springer
169views Database» more  CDB 2004»
15 years 3 months ago
Semantic Optimization of Preference Queries
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). We present here a nu...
Jan Chomicki
SAC
1994
ACM
15 years 1 months ago
Fuzzy queries and relational databases
In this paper, the interest of fuzzy sets and possibility theory in the context of databases is presented. It is shown that these " notions provide an homogeneous framework f...
Patrick Bosc, Olivier Pivert
VLDB
2001
ACM
100views Database» more  VLDB 2001»
15 years 2 months ago
VXMLR: A Visual XML-Relational Database System
We demonstrate a visual based XML-Relational database system where XML data is managed by commercial RDBMS. A query interface enables users to form path expression based queries a...
Aoying Zhou, Hongjun Lu, Shihui Zheng, Yuqi Liang,...
CORR
2002
Springer
81views Education» more  CORR 2002»
14 years 9 months ago
Towards practical meta-querying
We describe a meta-querying system for databases containing queries in addition to ordinary data. In the context of such databases, a meta-query is a query about queries. Represen...
Jan Van den Bussche, Stijn Vansummeren, Gottfried ...
FQAS
2009
Springer
202views Database» more  FQAS 2009»
15 years 4 months ago
Controlled Aggregate Tree Shaped Questions over Ontologies
Abstract. Controlled languages (CLs) are ambiguity-free subsets of natural languages such as English offering a good trade-off between the formal rigor of ontology and query langua...
Camilo Thorne, Diego Calvanese