e r diagram, Database Management System

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how to make an e r diagram?

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Improve efficiency in query evaluation, Question: AirwaysCentre, an int...

Question: AirwaysCentre, an international airline booking company currently uses a relational database system for their operations, which includes the following relations: P

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State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso

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What is transaction? Collections of operations that form a single logical unit of work are known as transactions.

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Can a filed occur in several field groups. Yes.  But it leads to redundant data redundancy.

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These are the binary operations; i.e., each is applied to two relations or sets. These two relations can be union compatible excluding in case of Cartesian product. Two relations R

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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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Discuss along with examples about several types of attributes present in the ER model? Types of Attributes are: • SIMPLE attributes are attributes which are drawn from the ato

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A Relation Schema represented by R(A1, A2, ..., An) is made up of the relation name the list of attributes and R Ai that it contains. A relation is described as a set of tuples

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