Design the star schema to analyses the employee salary according to their age (by year or by decade), their study level and the geographic location of the enterprise. The study level analysis can be performed according to the higher study level reached (primary, secondary school, university level) or according to the last obtained degree (primary degree, secondary degree, bachelor, master, PhD). The geographic enterprise location analysis can be conducted by city, region, or country

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Fundamentals of Datawarehouse

A data warehouse is a data repository which is used to store large quantities of historical data that are mostly used for creating reports that help businesses to identify their weaknesses and strengths. For example, demographics data about people of a region can help businesses identify the needs and preferences of the region’s population. A data warehouse acts as a central storage for storing data that comes from one or more heterogenous sources. It also consists of data which can be old and of historical value. One of the most important applications of this type of system is that it is used for supporting business intelligence and data analytics applications.