Thursday, April 28, 2016
Wednesday, April 27, 2016
What is Data Warehouse?
A data warehouse is a relational database which is used for reporting and data analysis. Data warehouse is a main component of BI.
Data warehouse can be defined under two main concept-
According to Bill Inmon-
A data warehouse is subject-oriented,integrated,time-variant and non-volatile collection of data in support of management's decision-making process.
According to Ralph Kimball-
A data warehouse is a copy of transaction data specifically structured for query and analysis.
Data warehouse can be defined under two main concept-
According to Bill Inmon-
A data warehouse is subject-oriented,integrated,time-variant and non-volatile collection of data in support of management's decision-making process.
According to Ralph Kimball-
A data warehouse is a copy of transaction data specifically structured for query and analysis.
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