Top-down and bottom-up approaches for building data warehouse.

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written 2.5 years ago by

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A data-warehouse is a heterogeneous collection of different data sources organised under a unified schema. There are 2 approaches for constructing data-warehouse: Top-down approach and Bottom-up approach are explained as below.

Top-down approach:

The essential components are discussed below:

External Sources –External source is a source from where data is …

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