Data Mining: Concepts and Techniques, 3rd Edition

Publisher Summary

This chapter presents an overview of data warehouse and online analytical processing (OLAP) technology. This overview is essential for understanding the overall data mining and knowledge discovery process. Data warehouses generalize and consolidate data in multidimensional space. The construction of data warehouses involves data cleaning, data integration, and data transformation, and can be viewed as an important preprocessing step for data mining. Moreover, data warehouses provide OLAP tools for the interactive analysis of multidimensional data of varied granularities, which facilitates effective data generalization and data mining. Many other data mining functions, such as association, classification, prediction, and clustering, ...