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Introduction to Database System

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

True
False

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Introduction to Database System
The model for a _____ resembles the hierarchical model in many respects.

Relational database
None of these
Distributed database
Hierarchical database
Network database

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Introduction to Database System
In SQL, which command(s) is(are) used to enable/disable all triggers on a table?

ALTER TRIGGERS
ALTER TABLE
MODIFY TRIGGERS IN TABLE
All of the listed here

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Introduction to Database System
An attribute is a(n):

row of a table.
two dimensional table.
key of a table.
column of a table.

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Introduction to Database System
Which of the following refers to something that can be identified in the user's work environment, something that the users want to track?

Entity
Attribute
Identifier
Relationship

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Introduction to Database System
The modify operation is likely to be done after

Delete
Look-up
Insert
None of these
All of these

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