995 search results - page 147 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
152
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TKDE
2012
13 years 4 months ago
2012
— We present a query formulation language (called MashQL) in order to easily query and fuse structured data on the web. The main novelty of MashQL is that it allows people with l...
109
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SP
1996
IEEE
15 years 6 months ago
1996
IEEE
View-based access control enables content-based and context-based security, as opposed to container-based security provided in operating systems. However, view-based access contro...
104
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PODS
2010
ACM
15 years 7 months ago
2010
ACM
We give the first optimal algorithm for estimating the number of distinct elements in a data stream, closing a long line of theoretical research on this problem begun by Flajolet...
EDBT
2009
ACM
15 years 6 months ago
2009
ACM
A view selection algorithm takes as input a fact table and computes a set of views to store in order to speed up queries. The performance of view selection algorithm is usually me...
140
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EDBT
2009
ACM
15 years 8 months ago
2009
ACM
Data stream management systems usually have to process many long-running queries that are active at the same time. Multiple queries can be evaluated more efficiently together tha...