Exam 15: Normalize a Database for Effective Design

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The ________ requires that all determinants are candidate keys and that all lower levels of NF are satisfied.

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D

An entity relationship diagram tells you about data flow and is a fixed view of the database structure.

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False

A database record equivalent is also known as a(n)________.

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D

The ________ normal form requires that the table has to be free of transitive dependencies.

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A(n)________ anomaly forces you to enter data about two different entities when you have data on only one entity.

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In the ________ normal form,the table has no fields with partial dependencies on a composite or concatenated key.

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A(n)________ is when the field only depends on one part of a composite or concatenated key.In other words,the field is determined by only one piece of a multifield key.

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Which of the following is NOT true when deciding when to use a surrogate key?

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Which of the following is NOT true about identifying the attributes in an ERD?

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In a small business,a department might be managed by no more than one manager,and each manager manages no more than one department.This is an example of a ________ relationship.

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________ will remove every record with the foreign key if the record with the value is deleted from the primary table.

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An example of an artificial key is a driver's license number.

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The ________ normal form dictates that the table must not have repeating groups of values in a single column and that it must have a key.

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A primary key is a field that uniquely identifies a record.

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A surrogate key can increase the file size and require more joins.

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Match the following terms to their description.
Surrogate key
A field that uniquely identifies a record
Primary key
Created from routinely occurring data generated outside of a database
Artificial key
Nonnaturally occurring data that is visible to the user
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Surrogate key
A field that uniquely identifies a record
Primary key
Created from routinely occurring data generated outside of a database
Artificial key
Nonnaturally occurring data that is visible to the user
Composite key
Sometimes referred to as a concatenated key
Natural key
Nonnaturally occurring data that is not visible to the user
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By normalizing to ________,you are eliminating all functional dependencies.

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When multiple fields are used to identify a record,it is a(n)________ key.

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A deletion anomaly forces you to delete one piece of data when you wanted to delete two pieces of data.

(True/False)
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Match the following terms to their description.
3NF
The table has no fields with partial dependencies on a composite or concatenated key and satisfies 1NF.
BCNF
The table has to be free of transitive dependencies and satisfy all lower levels of NF.
NF
The table must not have repeating groups of values in a single column and it must have a key.
Correct Answer:
Verified
Premises:
Responses:
3NF
The table has no fields with partial dependencies on a composite or concatenated key and satisfies 1NF.
BCNF
The table has to be free of transitive dependencies and satisfy all lower levels of NF.
NF
The table must not have repeating groups of values in a single column and it must have a key.
ERD
All determinants are candidate keys and satisfy all lower levels of NF.
2NF
Common way to visually express the tables and relationships in your database.
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