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Introduction to Database System

Introduction to Database System
The _____ command is used to allocates an extent for the table in SQL

MODIFY TABLE
MODIFY ALLOCATES
None of these
REDEFINE TABLE
ALTER TABLE

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Introduction to Database System
In an enterprise-class database system, business users interact directly with database applications, which directly access the database data.

False
True

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Introduction to Database System
Each of data files has a _____ that describe the way the data is stored in the file.

File structure
Fields
Database
Records

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Introduction to Database System
In SQL, which command is used to create a database user?

ADD USER TO DATABASE
All of the listed here
MK USER
CREATE USER

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Introduction to Database System
Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?

Instance entity
Archetype entity
Subtype entity
Supertype entity

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Introduction to Database System
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

True
False

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