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Explain the concept of generalization and aggregation in E_R diagrams. Give one example for each one of them? Generalization: Consider extending the entity set account throug
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Q.1 Briefly discuss the different layers of ANSI SPARC architecture. Ans: The three layers of ANSI SPARC architecture are like this: 1. Internal view is at the lowest leve
external and internal mapping with examples
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
A buyer for a large department store chain must place orders with an athletic shoe manufacturer six months prior to the time the shoes will be sold in the department stores. In par
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
Explanation on Data Sharing?
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