Exam 14: Database Design

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A good data model is essentially non-redundant. This means that each data attribute, other than foreign keys, describes at most one entity.

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A significant disadvantage of ___________________ (conventional files or databases) is their inflexibility and non-scalability.

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SQL allows you to __________________ two or more tables across a common field (a primary and a foreign key).

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Files that contain relatively static data that can be shared by applications to maintain consistency and improve performance are known as:

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The database technology used to support data architecture is called:

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As enterprise systems and applications are re-engineered, the trend is overwhelmingly in favor of replacing database systems and applications with legacy file-based systems and applications.

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The physical, relational database implementation of a data model is known as a:

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When a table or entire rows in a table are assigned to different database servers and locations, it is known as:

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Triggers are programs embedded within a table that are automatically invoked by updates to another table.

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A fundamental characteristic of SQL is that commands return a set of records.

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In a relational database ach table (sometimes called a relation) consists of named columns (which are fields or attributes) and any number of unnamed rows (which correspond to records).

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Fields whose values identify one and only one record in a file are called:

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________________________________ files and tables contain stored copies of historical data for easy retrieval and review without the overhead of regeneration.

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________________________________ are programs embedded within a table that can be called from an application program.

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A(n) _____________________________ is the physical model or blueprint for a database. It represents the technical implementation of the logical data model.

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A data manipulation language (DML) is used to create, read, update, and delete records in the database and to navigate between different records and types of records.

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Many information systems shops hesitate to give end users access to operational databases for queries and reports.

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File technology is more complex than database technology.

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During the creation of database schemas, NULL means the field must have a value; whereas, NOT NULL means the field must not have a value.

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Archival files and tables contain master and transaction file records that have been moved from on-line storage to off-line storage.

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