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Introduction to Database System

Introduction to Database System
Entity instances are associated by relationship classes.

False
True

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Introduction to Database System
All instances of an entity class have the same attributes.

False
True

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Introduction to Database System
Database applications are seldom intended for use by a single user.

False
True

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Introduction to Database System
A relation is considered a:

one-dimensional table.
two-dimensional table.
Column.
three-dimensional table.

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Introduction to Database System
In SQL, which command(s) is(are) used to enable/disable a database trigger?

MODIFY USER
CHANGE USER
ALTER TRIGGER
All of the listed here

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Introduction to Database System
The language used in application programs to request data from the DBMS is referred to as the

DML
query language
DDL
All of the listed here

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