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Introduction to Database System

Introduction to Database System
The logical data structure with a one-to-many relationship is a

tree
network
chain
relational

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Introduction to Database System
Updating a database means

all of the listed here
revising the file structure
modifying or adding record occurrences
reorganizing the database

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Introduction to Database System
To have a file hold a list, it is necessary to

All of the listed here
decide which fields will be used as sort or index keys
identify the name, width and type of the fields of each record.
identify the records in the list

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Introduction to Database System
The different classes of relations created by the technique for preventing modification anomalies are called:

functional dependencies.
referential integrity constraints.
None of these
normal forms.

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Introduction to Database System
Entities can be associated with one another in which of the following?

Entities
Identifiers
Relationships
Attributes

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

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

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