Datawarehouse Case studies, Database Management System

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I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each

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Explain the Natural join Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinati

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Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes

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