A Data warehouse is a collection of information used to manage and direct the buisness for the most profitable outcome.it is the data(meta/fact/dimension/aggregation) and the process managers(load/warehouse/query) that make information available,enabling people to make informed decisions.
Why Do We Need A Data Warehouse ?
We Can Only
See - What We
Can See !
It is BETTER,FASTER,CHEAPER,Subject Oriented,Integrated,Time Variant & Non-volatile.
It
1)Produce Reports For Long Term Trend Analysis
2)Produce Reports Aggregating Enterprise Data
3)Produce Reports of Multiple Dimensions
Mainly Technical architects,system engineers,database designers,dba's,system managers,operating managers and project managers are using DWH.
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