Wite a SQL query to create gientable. ТАBLE-TITLE WORKER REP_ID WORKER TITLE AFFECTED_FROM Manager 2016-02-20 00:00:00 Executive 2016-06-11 00:00:00 Executive 2016-06-11 00:00:00 Manager 2016-06-11 00:00:00 Ast. Manager 2016-06-11 00:00:00 Executive 2016-06-11 00:00:00 Lead 2010-06-11 00:00:00 Lead 2016-06-11 00:00:00

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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.