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1. Aggregations scenario
- www-db.stanford.edu
2. Aggregations
- doc.ddart.net
- Aggregations.
- Aggregations are precalculated summaries of data that improve query response time by having the answers ready before the questions are asked. ...
- Aggregations are stored in the multidimensional structure in cells at coordinates specified by the dimensions. ...
- If all summary data has been precalculated into aggregations, the response time of queries like this will depend only on the time needed to extract the specified cells. ...
- Precalculation of all possible aggregations in a cube results in the fastest possible response time for all queries. However, the storage and processing time required for the aggregations can be substantial. ...
- There is a tradeoff between storage requirements and the percentage of possible aggregations that are precalculated. If no aggregations are precalculated (0%), little storage space is required beyond that necessary to store the base data. ...
- Microsoft® SQL Server™ OLAP Services incorporates a sophisticated algorithm to select aggregations for precalculation so that other aggregations can be quickly computed from precalculated values. For example, if the aggregations are precalculated for the month level of a time dimension, the calculation for a quarter requires only the summarization of three numbers, which can be quickly computed on the fly. ...
3. What about e-aggregations?
- www.library.yale.edu
4. Re: enumerated columns and aggregations - Kdb Listbox Archive - Kx Systems
- www.kx.com
- Kdb Listbox Archive - Kx Systems Message Prev Message Next Thread Prev Thread Next Message Index Thread Index Re: enumerated columns and aggregations.
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5. Milton - Persistence - Aggregations
- www.miltonsoftware.co.uk
- Persistence - Aggregations.
- An Entity Bean may be a Composite Entity (see J2EE Patterns) that contains one or more aggregations of objects. ...
6. ACOUSTICAL MONITORING OF THE DYNAMICS OF THIN LAYERS AND AGGREGATIONS OF PLANKTON AND FISH
- www.aslo.org
- ACOUSTICAL MONITORING OF THE DYNAMICS OF THIN LAYERS AND AGGREGATIONS OF PLANKTON AND FISH.
- This acoustical monitoring of thin scattering layers and aggregations revealed a complex, dynamic distribution of zooplankton and fish. ...
7. Workshop on collective behavior of pelagic fish: schools and aggregations
- www2.hawaii.edu
- Our knowledge on the characteristics and dynamics of those schools and aggregations, as well as their origins, is, however, very poor. Because of this lack of knowledge, stock assessment and fishery management are rarely based on these units (schools and aggregations), while they certainly represent key components of the system. ... Pelagic schools and aggregations, however, usually comprise thousands of individuals and the links between the behavior of small captive schools to the behavior of large schools in the ocean, and therefore to fishery management, are not easy. ...
- Moreover, studying the relationships between different species gathered in same schools or aggregations is a major issue for an ecosystem-based management of pelagic fisheries. ...
8. Indexing for Performance, Part 3: Aggregations and Indexed Views from Penton Media White Papers at Builder UK
- uk.builder.com
- Builder UK > White Papers > Database Management Indexing for Performance, Part 3: Aggregations and Indexed Views Download Now.
- When looking at performance, SARGs and Joins are the first step, but what about Aggregations? Indexes on base tables can significantly improve the performance for highly selective queries as well as range queries. However, often you're interesting in more complex details, aggregations or join data that accesses a range. ...
9. UML patterns for typical aggregations
- james.globalse.org
10. Analysis of Aggregations of Electronic Monographs: Example 4.1
- www-personal.umich.edu
- University of Michigan/University Library Cataloging Policy Council Draft Policy Proposal 10/15/99 Analysis of Aggregations of Electronic Monographs: Example 4. ...
11. dBforums - a finer grain control when rebuilding aggregations
- dbforums.com
- olap > a finer grain control when rebuilding aggregations .
- a finer grain control when rebuilding aggregations In webcast on Microsoft SQL Server 2000 Service Pack 3, Richard Tkachuk, a Lead Program Manager in the Analysis Services Team, mentioned the following: SP3 also introduces a finer grain control when rebuilding aggregations. You may know that after processing is completed, that we rebuild some so-called lazy aggregations outside of the COMMIT TRANSACTION. We're now giving you the fine grain control to move that lazy aggregation processing inside the transaction, and that way, queries will be unaffected by the server building those aggregations. ...
- Re: a finer grain control when rebuilding aggregations Hi Ohjoo, Have a look at the new CommitTransEx method on the MDStore object, and the processFullReaggregate process type, in the SP3 update of Books Online. ... > In webcast on Microsoft SQL Server 2000 Service Pack 3, Richard Tkachuk, a > Lead Program Manager in the Analysis Services Team, mentioned the following: > SP3 also introduces a finer grain control when rebuilding aggregations. You > may know that after processing is completed, that we rebuild some so-called > lazy aggregations outside of the COMMIT TRANSACTION. We're now giving you > the fine grain control to move that lazy aggregation processing inside the > transaction, and that way, queries will be unaffected by the server building > those aggregations. ...
12. Studying Nassau grouper spawning aggregations: The key to rebuilding and conserving this important fishery resource
- www.nurp.noaa.gov
- Studying Nassau grouper spawning aggregations.
- Most of this research focuses on large spawning aggregations, at which thousands of Nassau grouper gather each year during one or more winter full moons. This stage in the life cycle of the Nassau grouper is particularly important to understand since the entire annual reproduction for a region is concentrated at a few particular spots where aggregations occur, for only a few days each year. Furthermore, because fishers often know where and when these spawning aggregations occur, the fish are usually subject to the greatest fishing pressure at these times. In many instances, entire regional stocks have been wiped out due to intense fishing pressure on spawning aggregations. ...
- Through tagging fish that are captured in the fishery and ultrasonic telemetry, this research has shown that fish may migrate over 100 miles to spawning aggregations, and may spend only a few days at these aggregations. This highlights the importance of sustaining spawning aggregations for protecting stocks throughout an entire region. Furthermore, a comparison of the characteristics of fish at current spawning aggregations to characteristics of fish at the same spawning aggregations over 10 years ago, indicates that even moderate fishing pressure on spawning aggregations over a decade may have a large effect on fish stocks such as a reduction in the number of fish at spawning aggregations, a reduction in the size of fish at spawning aggregations, and a skewed ratio of males to females at spawning aggregations. ...
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