Exam 9: Database Management Systems

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The data manipulation language

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The database management system provides a controlled environment for accessing the database.

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The term occurrence is used to describe the number of items associated with an entity.

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Describe an environment in which a firm should use a partitioned database.

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Define repeating groups,partial dependencies and transitive dependencies and discuss how they are dealt with in the process of normalizing tables.

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Explain how to link tables in (1:1)association.Why may this be different in a (1:0,1)association?

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What is a database lockout?

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Which characteristic is associated with the database approach to data management?

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A lockout is a software control that prevents multiple users from simultaneous access to data.

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The advantages of a partitioned database include all of the following except

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Which term is not associated with the relational database model?

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Data currency is preserved in a centralized database by

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Task-data dependency is directly related to data redundancy.

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What are the four characteristics of a properly designed database table?

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What are two types of distributed databases?

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What is the insertion anomaly?

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Explain a database lockout and the deadlock phenomenon.Contrast that to concurrency control and the timestamping technique.Describe the importance of these items in relation to database integrity.

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The deletion anomaly in unnormalized databases

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In the relational model,a data element is called a relation.

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The normalization process involves identifying and removing structural dependencies from the tables being modeled.

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