Deck 2: Database Design Fundamentals

Question 1

Because there is a one-to-many relationship between sales reps and customers in the Premiere Products database, one sales rep can be associated with zero, one, or more customers.

Answer 1

True

Question 2

In a relational database, relationships are implemented by having common columns in two or more tables.

Answer 2

True

Question 3

In a relational database, two columns can be identical.

Answer 3

False

Question 4

The same column name can appear in two different tables in a relational database.

Question 5

In the one-to-many type of relationship, the word many always indicates a large number.

Question 6

Tables are called relations.

Question 7

You can determine functional dependence by viewing sample data.

Question 8

In a relational database, each entity has its own table.

Question 9

Each column in a table of a relational database should have a distinct name.

Question 10

Columns are sometimes called tuples.

Question 11

A relation is essentially a(n)three-dimensional table.

Question 12

A(n)relation is a characteristic or property of an entity.

Question 13

A secondary key is the unique identifier for a table.

Question 14

You usually indicate a table's primary key by underlining the column or collection of columns that comprises the primary key for each table in the database.

Question 15

In a relation, all values in a column are values of the same attribute.

Question 16

The concept of functional dependence is trivial to understanding database concepts.

Question 17

The statement "A sales rep's pay class functionally determines his or her pay rate" means that if you know the pay class, you also know the pay rate.

Question 18

The process of determining the particular tables and columns that will comprise a database is known as normalization.

Question 19

A primary key always comprises a single column

Question 20

A tabular database is a collection of tables.

Question 21

A programmer interviews users, examines existing and proposed documents, and examines organizational policies to determine exactly the type of data needs the database must support.

Question 22

Any column (or collection of columns)that determines another column is called a(n)____.

A)nonkey column
B)primary key
C)dependency
D)determinant

Question 23

In a relational database each ____ should be unique.

A)row
B)record
C)tuple
D)All of the above

Question 24

At Premiere Products, there is a ____ relationship between sales reps and customers.

A)one-to-one
B)one-to-two
C)one-to-many
D)many-to-many

Question 25

A table is in third normal form if it is in second normal form and no nonkey column is dependent on only a portion of the primary key.

Question 26

The definition for a primary key really defines a candidate key as well.

Question 27

An unnormalized relation is a relation that contains repeating groups.

Question 28

A(n)____ is the association between entities.

A)qualification
B)functional dependency
C)relationship
D)join

Question 29

Qualification is an update anomaly.

Question 30

Normalization is done before creating the database design.

Question 31

Which of the following is the primary key of the ORDER_LINE ( ORDER_NUM , PART_NUM , NUM_ORDERED, QUOTED_PRICE)table?

A)ORDER_NUM
B)PART_NUM
C)QUOTED_PRICE
D)ORDER_NUM and PART_NUM

Question 32

Which of the following symbols is used to qualify column names?

A).
B),
C)/
D)#

Question 33

A(n)____ is a characteristic or property of an entity.

A)field
B)attribute
C)column
D)All of the above

Question 34

The process of determining the particular tables and columns that will comprise a database is known as ____.

A)normalization
B)database design
C)qualification
D)relational management

Question 35

There is a commonly accepted shorthand representation to show the structure of a relational database: After the name of the table, all the columns in the table are listed within a set of ____.

A)square brackets
B)parentheses
C)back slashes
D)curly braces

Question 36

If a table contained both employee numbers and Social Security numbers, both columns would be referred to as candidate keys.

Question 37

It is possible for the computer to generate values that are used as the primary key column.

Question 38

A determinant is any column (or collection of columns)that determines another table.

Question 39

When you convert an unnormalized table to a table in first normal form, the primary key of the table in first normal form is usually the concatenation of at least two columns.

Question 40

Many organizations and institutions are moving toward using Social Security numbers as primary keys because of privacy issues.

Question 41

A(n)____________________ is a person, place, object, event, or idea for which you want to store and process data.

Question 42

____ can occur when there is a column in a table that is dependent on only a portion of the primary key.

A)Qualification
B)Update anomalies
C)Function splitting
D)Determination

Question 43

A(n)____________________ is the association between entities.

Question 44

In an entity-relationship (E-R)diagram, ____ are used to represent an entity.

A)rectangles
B)ovals
C)circles
D)diamonds

Question 45

____ is one of the categories of update anomalies.

A)Functional dependence
B)Functional splitting
C)Inconsistent data
D)Qualification

Question 46

A relation is in ____ if it does not contain any repeating groups.

A)first normal form
B)second normal form
C)third normal form
D)Boyce-Codd normal form

Question 47

____ is the formal term for combining two or more columns to form a primary key.

A)Qualification
B)Joining
C)Normalization
D)Concatenation

Question 48

____________________ is another name given to third normal form in this text.

Question 49

When you combine a column name with a table name, you are said to ____________________ the column name.

Question 50

A(n)____________________ column is a column that is not part of the primary key.

Question 51

In an entity-relationship (E-R)diagram, one-to-many relationships between entities are drawn as ____ .

A)ovals
B)equal signs
C)lines
D)circles

Question 52

A field is another term for a(n)____.

A)tuple
B)row
C)column
D)entity

Question 53

A ____ column is a column that is not part of the primary key.

A)determinant
B)candidate
C)functional
D)nonkey

Question 54

____ is the duplication of data.

A)Repeating group
B)Redundancy
C)Replication
D)Anomaly

Question 55

A record is another term for a(n)____.

A)tuple
B)field
C)attribute
D)property

Question 56

The ____________________ key of a table (relation)is the column or collection of columns that uniquely identifies a given row in that table.

Question 57

A relational database is a collection of ____________________.

Question 58

A table's design should be as simple as possible; you should restrict each position in a table to a single entry by not allowing multiple entries (called a(n)____________________ group)in an individual location in the table.

Question 59

In this text, Boyce-Codd normal form is the same as ____.

A)unnormalized
B)first normal form
C)second normal form
D)third normal form

Question 60

In one style of entity-relationship (E-R)diagrams, a crow's foot is used to represent the ____________________ side of a relationship.

Question 61

A(n)____________________ is another name for a record or a row.

Question 62

In one style of entity-relationship (E-R)diagrams, the letter n is used to represent the ____________________ side of a relationship.

Question 63

In one style of entity-relationship (E-R)diagrams, diamonds are used to describe ____________________.

Question 64

What is the precise definition of a primary key?

Question 65

If the primary key of a table contains only a single column, the table is automatically in ____________________ normal form.

Question 66

A relation is in ____________________ normal form if it does not contain any repeating groups.

Question 67

The four categories of update anomalies are additions, deletions, inconsistent data, and ____________________.

Question 68

In a relation, the order of the rows and columns is ____________________

Question 69

A relationship is an association between ____________________.

Question 70

Define a relation.

Question 71

What are the six steps necessary to design a database for a set of requirements?

Question 72

In a relational database, column B is _________________________ on another column A, it at any point in time a value for A determines a single value for B.

Question 73

How does a DBMS that follows the relational model handle entities, attributes of entities, and relationships between entities?

Question 74

If B is functionally dependent on A, you also can say that A functionally ____________________ it.

Question 75

When you write a column in the format CUSTOMER.REP_NUM, you say that you ____________________ the column name.