TAILIEUCHUNG - SQL Server MVP Deep Dives- P18

SQL Server MVP Deep Dives- P18: Each year Microsoft invites all the MVPs from every technology and country to Redmond for an MVP Summit—all top secret—“don’t tweet what you see!” During the MVP Summit, each product team holds a series of presentations where they explain their technologies, share their vision, and listen to some honest feedback. | 634 Chapter 50 BI for the relational guy Terminology Certain basic terms many of which are defined differently by different people are used in business intelligence. I will submit my definitions which are based on my background to serve as a reference for this chapter. Data warehouse. Aa relational store of data that serves as a basis for reporting queries and or a source for OLAP cubes. It consists of tables that support multiple subject areas in the organization. It is often designed using dimensional modeling techniques and in most Microsoft shops is housed in SQL Server. This term is often interchanged with data mart and in most cases data mart is more accurate. Data warehouse just sounds so much more substantial. I tend to use data warehouse even when referring to a data mart because it tends to be used generically to cover both and so that is the term used throughout this chapter. Data mart Can be thought of as a mini data warehouse that is specific to a particular subject area. Subject areas tend to align themselves with organizational departments such as Sales Finance or Human Resources. Dimensional model Represents business data in terms of dimensions and facts. Dimensional models are represented as star or snowflake schema. The section Dimensional modeling later in this chapter will cover this topic in more detail. Business intelligence BI Generally a process and infrastructure that facilitates decision-making based on business data. BI is too often thought of in technical terms it is far more driven by business. Data mining The process of discovering valuable trends in historical data that can provide insight into future events based on a predetermined set of factors. A well-known example is on where books are recommended to you based on your past buying patterns compared to those of other customers who have purchased the same books. ETL extract transform and load The process of moving data from a source system usually online transactional .

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