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Index selection for OLAP

Proceedings 13th International Conference on Data Engineering, 2002
On-line analytical processing (OLAP) is a recent and important application of database systems. Typically, OLAP data is presented as a multidimensional "data cube." OLAP queries are complex and can take many hours or even days to run, if executed directly on the raw data.
Himanshu Gupta 0001   +3 more
openaire   +1 more source

Selection index updating

Theoretical and Applied Genetics, 1992
When traits become evident at different ages or there are large differences in the costs of measuring various traits, selection by independent culling levels may give a higher aggregate economic return than index selection because not all traits need to be measured on all individuals.
S, Xu, W M, Muir
openaire   +2 more sources

Restriction of Selection Indexes

Biometrics, 1970
A selection index may be restricted by requiring that the genetic changes it produces in one or more traits equal zero or some predetermined value, or are of specified sign. Retaining the equations of constraint explicitly in the system simplifies the index equations, facilitates the calculation of the 'genetic cost' of each restriction, and gives the ...
E P, Cunningham, R A, Moen, T, Gjedrem
openaire   +2 more sources

On the selection of secondary indexes

Proceedings of the 1974 annual conference on XX - ACM '74, 1974
The selection of secondary indexes to use for speeding up the access to information is one of the key problems in data organization. While in general, the provision of indexes facilitate data retrieval, we are also expected to pay a certain amount of various costs.
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Validation of genomic predictions for a lifetime merit selection index for the US dairy industry

Journal of Dairy Science, 2020
Brenda Fessenden   +2 more
exaly  

SELECTIVE INDEXING

The Indexer, 1975
openaire   +1 more source

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