409 search results - page 67 / 82 » Plan Databases: Model and Algebra |
169
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SIGMOD
2008
ACM
15 years 9 months ago
2008
ACM
To deal with data uncertainty, existing probabilistic database systems augment tuples with attribute-level or tuple-level probability values, which are loaded into the database al...
115
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BTW
2005
Springer
15 years 3 months ago
2005
Springer
Abstract: Peer data management systems (PDMS) are the natural extension of integrated information systems. Conventionally, a single integrating system manages an integrated schema,...
115
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ICDE
2012
IEEE
12 years 12 months ago
2012
IEEE
— Accurate query performance prediction (QPP) is central to effective resource management, query optimization and query scheduling. Analytical cost models, used in current genera...
155
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SIGMOD
2005
ACM
15 years 9 months ago
2005
ACM
A defining characteristic of continuous queries over on-line data streams, possibly bounded by sliding windows, is the potentially infinite and time-evolving nature of their input...
155
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ICDE
1999
IEEE
15 years 10 months ago
1999
IEEE
Most operations of the relational algebra or SQL require a sorted stream of tuples for efficient processing. Therefore, processing complex relational queries relies on efficient a...