June 2011
Beginner to intermediate
744 pages
25h 11m
English
Content preview from Data Mining: Concepts and Techniques, 3rd Edition
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5.1 Data Cube Computation: Preliminary Concepts
Data cubes facilitate the online analytical processing of multidimensional data. “But how can we compute data cubes in advance, so that they are handy and readily available for query processing?” This section contrasts full cube materialization (i.e., precomputation) versus various strategies for partial cube materialization. For completeness, we begin with a review of the basic terminology involving data cubes. We also introduce a cube cell notation that is useful for describing data cube computation methods.
5.1.1 Cube Materialization: Full Cube, Iceberg Cube, Closed Cube, and Cube Shell
Figure 5.1 shows a 3-D data cube for the dimensions A, B, and C, and an aggregate measure, M. Commonly used ...
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