716 search results - page 18 / 144 » Optimizing Queries in Extended Relational Databases |
127
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IDEAS
2010
IEEE
14 years 9 months ago
2010
IEEE
Even though an effective cost-based query optimizer is of utmost importance for the efficient evaluation of XQuery expressions in native XML database systems, such a component is...
184
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ICDE
2006
IEEE
16 years 16 days ago
2006
IEEE
"Sparse" data, in which relations have many attributes that are null for most tuples, presents a challenge for relational database management systems. If one uses the no...
HICSS
2011
IEEE
14 years 2 months ago
2011
IEEE
— Decision optimization is used in many applications such as those for finding the best course of action in emergencies. However, optimization solutions require considerable mat...
SIGMOD
2001
ACM
15 years 11 months ago
2001
ACM
Estimating the result size of complex queries that involve selection on multiple attributes and the join of several relations is a difficult but fundamental task in database query...
101
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CL
2000
Springer
15 years 3 months ago
2000
Springer
In this paper, an algorithm for obtaining consistent answers to queries posed to inconsistent relational databases is presented. The algorith is proven to be sound, terminating and...