Chapter 12

Data Mining from Relationally Structured Data, Marts, and Warehouses

Abstract

One of the fundamental uses of information technology is data storage. The simplest way to store data is in the form of a flat file, text file, spreadsheet, or table. However, many businesses have more complex relational database systems based on data structures that reflect the relations between the key data entities and their relations, using primary indexes/keys, secondary indexes, normalized data structures, and so on. This chapter discusses the concepts of data mart and data warehouse and comments on how the informational data is separated from the operational data. Then the chapter follows an example of extracting data from an operational environment ...

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