ER diagram , Database Management System

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Suppose that in an organisation, an employee may do different roles in dissimilar projects. Say, RAM is doing coding in one project and doing designing in another. Suppose that the

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Write a short note on oracle Instance? Oracle Instances: An instance is the (executed) Oracle software and the memory they use. It is the instance which manipulates the data s

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What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.

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What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data

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why are older data models are being replaced by new data models

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What are the strategies of implementation of the statecharts, What are the ...

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Briefly explain each of the following database terms. Use no more than 2-3 lines for each term. 1. DBMS 2. Update Anomaly 3. Alias (referring to tables in SQL queries)

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Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.

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An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val

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