Question: What is a relationship type? How does a relationship type differ from a relationship instance? 2 . What is meant by the degree of a

What is a relationship type? How does a relationship type differ from a relationship instance?

2 .

What is meant by the

degree

of a relationship?

3 .

Please answer the following two questions.

VEHICLE

SALESPERSON

Sales

1

VEHICLE

SALESPERSON

Sales

1

Sold

_

Sold

_

Sells

1

2

3

1

2

3

4

5

1

2

3

4

5

Instance Diagram

1

2

3

1

2

3

4

5

1

2

3

4

Instance Diagram

SALES VEHICLESALESPERSON

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

1

What is a relationship type? How does a relationship type differ from a relationship instance?

2 .

What is meant by the

degree

of a relationship?

3 .

Please answer the following two questions.

VEHICLE

SALESPERSON

Sales

1

VEHICLE

SALESPERSON

Sales

1

Sold

_

Sold

_

Sells

1

2

3

1

2

3

4

5

1

2

3

4

5

Instance Diagram

1

2

3

1

2

3

4

5

1

2

3

4

Instance Diagram

SALES VEHICLESALESPERSON

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

1

What is a relationship type? How does a relationship type differ from a relationship instance?

2 .

What is meant by the

degree

of a relationship?

3 .

Please answer the following two questions.

VEHICLE

SALESPERSON

Sales

1

VEHICLE

SALESPERSON

Sales

1

Sold

_

Sold

_

Sells

1

2

3

1

2

3

4

5

1

2

3

4

5

Instance Diagram

1

2

3

1

2

3

4

5

1

2

3

4

Instance Diagram

SALES VEHICLESALESPERSON

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

1

What is a relationship type? How does a relationship type differ from a relationship instance?

2 .

What is meant by the

degree

of a relationship?

3 .

Please answer the following two questions.

VEHICLE

SALESPERSON

Sales

1

VEHICLE

SALESPERSON

Sales

1

Sold

_

Sold

_

Sells

1

2

3

1

2

3

4

5

1

2

3

4

5

Instance Diagram

1

2

3

1

2

3

4

5

1

2

3

4

Instance Diagram

SALES VEHICLESALESPERSON

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

Is the instance diagram on the right consistent with the cardinality ratio shown in the ER diagram

on the left? Why or Why not?

1

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