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Data Mining: Concepts and Techniques, 3rd Edition by Micheline Kamber, Jian Pei, Jiawei Han

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5.3 Processing Advanced Kinds of Queries by Exploring Cube Technology

Data cubes are not confined to the simple multidimensional structure illustrated in the last section for typical business data warehouse applications. The methods described in this section further develop data cube technology for effective processing of advanced kinds of queries. Section 5.3.1 explores sampling cubes. This extension of data cube technology can be used to answer queries on sample data, such as survey data, which represent a sample or subset of a target data population of interest. Section 5.3.2 explains how ranking cubes can be computed to answer top-k queries, such as “find the top 5 cars,” according to some user-specified criteria.

The basic data cube structure ...

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