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Introduction to Database System

Introduction to Database System
An attribute that names or identifies entity instances is a(n):

attribute.
entity.
relationship.
identifier.

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Introduction to Database System
A primary key is a composite key that was selected to be the main identifier for the relation.

True
False

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Introduction to Database System
In SQL, the ALTER TABLESPACE command is used

to add/rename data files
to take a tablespace online/offline
to change storage characteristics
All of the listed here

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Introduction to Database System
Characteristic(s) of a distributed MIS structure is

a multiprocessing environment
None of these
computers supporting local DP operations
interactive sharing of the workload
All of these

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Introduction to Database System
In SQL, the _____ command is used to recompile a view

None of these
COMPILE VIEW
DEFINE VIEW
ALTER VIEW
CREATE VIEW

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Introduction to Database System
A relation is a two-dimensional table.

False
True

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