2228 search results - page 147 / 446 » A System for Semantic Query Optimization |
IS
2008
14 years 10 months ago
2008
Consistent query answering is the problem of characterizing and computing the semantically correct answers to queries from a database that may not satisfy certain integrity constr...
106
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ECIR
2009
Springer
14 years 8 months ago
2009
Springer
Abstract. The structural heterogeneity and complexity of XML repositories makes query formulation challenging for users who have little knowledge of XML. To assist its users, an XM...
157
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SIGMOD
2006
ACM
15 years 10 months ago
2006
ACM
This paper presents a principled framework for efficient processing of ad-hoc top-k (ranking) aggregate queries, which provide the k groups with the highest aggregates as results....
81
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QSIC
2005
IEEE
15 years 3 months ago
2005
IEEE
Many programs need to access data in a relational database. This is usually done by means of queries written in SQL. Although the language SQL is declarative, certain runtime erro...
EDBT
2006
ACM
15 years 10 months ago
2006
ACM
Skyline queries help users make intelligent decisions over complex data, where different and often conflicting criteria are considered. Current skyline computation methods are rest...