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Aggregation: Selecting the data in group of records is called aggregation.

There are five aggregate system functions they are viz. Sum, Min, Max, Avg, Count. They all have their own purpose Decomposition: Selecting all data without

any grouping and aggregate functions is called Decomposition. The data is selected, as it is present in the table.

Generalization: while generalization seems to be simplification of data, i.e. to bring the data from Un-normalized form to normalized form.

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Decomposition is the breaking down of living organisms. It is a natural occurance of the organisms rotting. If it were not for decomposition the world would be covered in trash. FOR RDBMS There are five aggregate system functions they are viz. Sum, Min, Max, Avg, Count. They all have their own purpose Decomposition: Selecting all data without any grouping and aggregate functions is called Decomposition. The data is selected, as it is present in the table.


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