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12 January 2021
#Data_Warehouse
Data_Warehouse
Interview question
Data_Warehouse
Data warehouse is an information system that contains historical and commutative data from single or multiple sources.
It is subject oriented as it offers information regarding subject instead of organization's ongoing operations.
In Data Warehouse, integration means the establishment of a common unit of measure for all similar data from the different databases
It is also non-volatile means the previous data is not erased when new data is entered in it.
It is Time-variant as the data in a DW has high shelf life.
There are 5 main components of a Datawarehouse.
Points to remember
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