a. Primary Key: A primary key is a special column of a relation used for uniquely identifying a relation. The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table. The features of a primary are: The primary key contains a unique value for each row of data. The primary key column cannot contain null values. The appropriate primary keys for each relation: Relation name Primary key branch branch_name customer customer_name loan loan_number borrower customer_...

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Answer 1

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Chapter 2, Problem 12E

Explanation of Solution

a.

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

The appropriate primary keys for each relation:

Relation name Primary key
branch branch_name
customer customer_name
loan loan_number
borrower customer_...

Explanation of Solution

b.

Foreign key:

A foreign key is an attribute/column which is used for establishing relationship between two tables/relations.

A foreign key must be primary key of the table to which it is referring.

The appropriate foreign keys are as follows:

Relation name Foreign key
loan branch_name
borrower customer_name, loan_number
account branch_name
depositor customer_name, account_number

Explanation:

In loan relation, branch_name is a foreign key...

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Dijkstra's Algorithm (part 1). Consider the network shown below, and Dijkstra’s link-state algorithm. Here, we are interested in computing the least cost path from node E (note: the start node here is E) to all other nodes using Dijkstra's algorithm. Using the algorithm statement used in the textbook and its visual representation, complete the "Step 0" row in the table below showing the link state algorithm’s execution by matching the table entries (i), (ii), (iii), and (iv) with their values. Write down your final [correct] answer, as you‘ll need it for the next question.

4. |z + 5 - 5i| = 7

14. dz, C: |z❘ C: |z❘ = 0.6 ze² - 2iz H

Answer 2

Expert Solution & Answer

Chapter 2, Problem 12E

Explanation of Solution

a.

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

The appropriate primary keys for each relation:

Relation name Primary key
branch branch_name
customer customer_name
loan loan_number
borrower customer_...

Explanation of Solution

b.

Foreign key:

A foreign key is an attribute/column which is used for establishing relationship between two tables/relations.

A foreign key must be primary key of the table to which it is referring.

The appropriate foreign keys are as follows:

Relation name Foreign key
loan branch_name
borrower customer_name, loan_number
account branch_name
depositor customer_name, account_number

Explanation:

In loan relation, branch_name is a foreign key...

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Check out a sample textbook solution

See solution

Answer 3

Expert Solution & Answer

Chapter 2, Problem 12E

Explanation of Solution

a.

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

The appropriate primary keys for each relation:

Relation name Primary key
branch branch_name
customer customer_name
loan loan_number
borrower customer_...

Explanation of Solution

b.

Foreign key:

A foreign key is an attribute/column which is used for establishing relationship between two tables/relations.

A foreign key must be primary key of the table to which it is referring.

The appropriate foreign keys are as follows:

Relation name Foreign key
loan branch_name
borrower customer_name, loan_number
account branch_name
depositor customer_name, account_number

Explanation:

In loan relation, branch_name is a foreign key...

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Check out a sample textbook solution

See solution

Answer 4

Expert Solution & Answer

Chapter 2, Problem 12E

Explanation of Solution

a.

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

The appropriate primary keys for each relation:

Relation name Primary key
branch branch_name
customer customer_name
loan loan_number
borrower customer_...

Explanation of Solution

b.

Foreign key:

A foreign key is an attribute/column which is used for establishing relationship between two tables/relations.

A foreign key must be primary key of the table to which it is referring.

The appropriate foreign keys are as follows:

Relation name Foreign key
loan branch_name
borrower customer_name, loan_number
account branch_name
depositor customer_name, account_number

Explanation:

In loan relation, branch_name is a foreign key...

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Check out a sample textbook solution

See solution

Answer 5

Expert Solution & Answer

Answer 6

Expert Solution & Answer

Answer 7

Chapter 2, Problem 12E

Explanation of Solution

a.

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

The appropriate primary keys for each relation:

Relation name Primary key
branch branch_name
customer customer_name
loan loan_number
borrower customer_...

Explanation of Solution

b.

Foreign key:

A foreign key is an attribute/column which is used for establishing relationship between two tables/relations.

A foreign key must be primary key of the table to which it is referring.

The appropriate foreign keys are as follows:

Relation name Foreign key
loan branch_name
borrower customer_name, loan_number
account branch_name
depositor customer_name, account_number

Explanation:

In loan relation, branch_name is a foreign key...

Answer 8

Chapter 2, Problem 12E

Explanation of Solution

a.

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

The appropriate primary keys for each relation:

Relation name Primary key
branch branch_name
customer customer_name
loan loan_number
borrower customer_...

Answer 9

Chapter 2, Problem 12E

Explanation of Solution

a.

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

The appropriate primary keys for each relation:

Relation name Primary key
branch branch_name
customer customer_name
loan loan_number
borrower customer_...

Answer 10

Explanation of Solution

b.

Foreign key:

A foreign key is an attribute/column which is used for establishing relationship between two tables/relations.

A foreign key must be primary key of the table to which it is referring.

The appropriate foreign keys are as follows:

Relation name Foreign key
loan branch_name
borrower customer_name, loan_number
account branch_name
depositor customer_name, account_number

Explanation:

In loan relation, branch_name is a foreign key...

Answer 11

Explanation of Solution

b.

Foreign key:

A foreign key is an attribute/column which is used for establishing relationship between two tables/relations.

A foreign key must be primary key of the table to which it is referring.

The appropriate foreign keys are as follows:

Relation name Foreign key
loan branch_name
borrower customer_name, loan_number
account branch_name
depositor customer_name, account_number

Explanation:

In loan relation, branch_name is a foreign key...

Answer 12

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Answer 13

Ch. 2 - Prob. 1PE Ch. 2 - Prob. 2PE Ch. 2 - Prob. 3PE Ch. 2 - Prob. 4PE Ch. 2 - Prob. 5PE Ch. 2 - Prob. 6PE Ch. 2 - Prob. 7PE Ch. 2 - Prob. 8PE Ch. 2 - Prob. 9PE Ch. 2 - Describe the differences in meaning between the...

Relation name	Primary key
branch	branch_name
customer	customer_name
loan	loan_number
borrower	customer_...

Relation name	Foreign key
loan	branch_name
borrower	customer_name, loan_number
account	branch_name
depositor	customer_name, account_number

Explanation of Solution

Explanation of Solution

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Chapter 2 Solutions