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OLAP Online Analytical Processing
Online Analytical Processing (OLAP) is a technique used in data mining and data warehousing to analyze large amounts of data from different perspectives. It allows users to analyze data interactively and perform complex queries on data in a quick and efficient manner.
OLAP systems are designed to support multidimensional data analysis, where data is organized into dimensions and measures. Dimensions represent the different aspects of the data, such as time, location, and product, while measures are the values that are analyzed, such as sales revenue or profit.
OLAP systems provide a variety of analytical functions, such as slicing and dicing, drill-down and roll-up, and pivoting, to enable users to analyze data in different ways. Slicing and dicing involves selecting a subset of data based on specific criteria, while drill-down and roll-up allow users to explore data at different levels of granularity. Pivoting enables users to view data in a different layout, such as switching rows and columns.
OLAP systems are typically used by business analysts and decision-makers to gain insights into their data and make informed decisions based on that information. OLAP is particularly useful for businesses that deal with large amounts of data and need to analyze that data from multiple perspectives.
Overall, OLAP is an essential tool for data mining and data warehousing, allowing businesses to gain valuable insights from their data and make more informed decisions.
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