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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 with the two new associations, as shown in Figure.
Figure: Transforming the association into a class
Q. Describe how an ER schema can be represented by relation schemas and constraints arising from ER design can be mapped to constraints on a relation schema. The entity rela
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Design a gennalization and specialization hierarchy for an automobile sales company
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
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