Exam 9: Database Management Systems

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Explain the three views of a database.

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How does the database approach solve the problem of data redundancy?

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The deletion anomaly in unnormalized databases

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Replicated databases create considerable data redundancy,which is in conflict with the database concept.Explain the justification of this approach.

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What is view integration?

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In the relational database model all of the following are true except

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Explain how linkages between relational tables are accomplished.

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In the database method of data management,access authority is maintained by systems programming.

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An entity is any physical thing about which the organization wishes to capture data.

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Each of the following is a relational algebra function except

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Use the following words to complete the sentences. Use the following words to complete the sentences.    -The __________________________ authorizes access to the database. -The __________________________ authorizes access to the database.

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An example of a distributed database is

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The data manipulation language

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Explain the purpose of an ER diagram in database design.

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A user view

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In the relational database model

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The data dictionary describes all of the data elements in the database.

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Entities are

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What is a partial dependency?

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What are two types of distributed databases?

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