Data aggregation
Define the term data aggregation?
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An operational data source generally consists of the records of individual transactions just like the product sales. If user of the data warehouse only requires a summed total, you may decrease the records to more manageable number by aggregating the data.
Explain why it is still essential to have at least certain familiarity with file processing systems even although it has become apparent that traditional file processing systems contain a number of shortcomings and restrictions.
State difference between Passive and Active transformation?
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Explain the Aggregator Transformation?
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What is an Operational Data Store?
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Illustrates each entry in the Link List called?
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