SQL injection attack: In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks. When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

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Chapter 9, Problem 16E

Explanation of Solution

SQL injection attack:

In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks.

When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

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Consider the following relations: Student(snum: integer, sname: string, rmajor: string, level: string, age: integer) Class(cname: string, meets_at: time, room: string, fid: integer) Enrolled(snum: integer, cname: string) Faculty(fid: integer, fname: string, deptid: integer) The meaning of these relations is straightforward; for example, Enrolled has one record per student-class pair such that the student is enrolled in the class. 2. Express each of the following integrity constraints in SQL unless it is implied by the primary and foreign key constraint; if so, explain how it is implied. If the constraint cannot be expressed in SQL, say so. For each constraint, state what operations (inserts, deletes, and updates on specific relations) must be monitored to enforce the constraint. (a) Every faculty member must teach at least two courses. (b) Every student must be enrolled in the course called 'Math101'. (c) A student cannot add more than two courses at a time…

Consider the following relational schema. An employee can work in more than one department; the pct_time field of the Works relation shows the percentage of time that a given employee works in a given department. Emp(eid: integer, ename: string, age: integer, salary: real) Works(eid: integer, did: integer, pct_time: integer) Dept(did: integer, budget: real, managerid: integer) Write the following queries in SQL: a. Print the name of each employee whose salary exceeds the budget of all of the departments that he or she works in. b. Find the enames of managers who manage only departments with budgets larger than $1 million, but at least one department with budget less than $5 million.

Consider the following schema: Suppliers(sid: integer, sname: string, address: string) Parts(pid: integer, pname: string, color: string) Catalog(sid: integer, pid: integer, cost: real) The Catalog relation lists the prices charged for parts by suppliers. Write the following queries in SQL: a. Find the sids of suppliers who charge more for some part than the average cost of that part (averaged over all the suppliers who supply that part). b. Find the sids of suppliers who supply a red part or a green part. c. For every supplier that supplies a green part and a red part, print the name and price of the most expensive part that she supplies.

Answer 2

Expert Solution & Answer

Chapter 9, Problem 16E

Explanation of Solution

SQL injection attack:

In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks.

When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Expert Solution & Answer

Chapter 9, Problem 16E

Explanation of Solution

SQL injection attack:

In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks.

When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

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Chapter 9, Problem 16E

Explanation of Solution

SQL injection attack:

In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks.

When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

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Answer 6

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Answer 7

Chapter 9, Problem 16E

Explanation of Solution

SQL injection attack:

In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks.

When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

Answer 8

Chapter 9, Problem 16E

Explanation of Solution

SQL injection attack:

In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks.

When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

Answer 9

Chapter 9, Problem 16E

Explanation of Solution

SQL injection attack:

In order to provide better security services to a system, an application developer must identify and prevent attacks such as cross-site scripting and SQL injection attacks.

When an attacker can insert and execute malicious code to a web as input, then it known as SQL injection attack...

Answer 10

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Answer 11

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Answer 12

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

Answer 13

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 9 - Prob. 1PE Ch. 9 - Prob. 2PE Ch. 9 - Prob. 3PE Ch. 9 - Prob. 4PE Ch. 9 - Prob. 5PE Ch. 9 - Prob. 6PE Ch. 9 - Prob. 7PE Ch. 9 - Testing for SQL-injection vulnerability: Suggest...Ch. 9 - Prob. 9PE Ch. 9 - Prob. 10PE

Concept explainers

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Explanation of Solution

Explanation of Solution

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Explanation of Solution

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...

Want to see the full answer?

Chapter 9 Solutions

Concept explainers

Videos

Explanation of Solution

Explanation of Solution

Working of SQL injection attack: The working of SQL injection attack is described as follows: Basically, the attacker terminates a text string and attaches a new command to it...

Explanation of Solution

Precautions taken to prevent SQL injection attack: The precautions taken to prevent an SQL injection attack are as follows: Never concatenate user input values directly into a query string. Use parameters with Dynamic SQL and particular stored procedures...

Want to see the full answer?

Chapter 9 Solutions

Working of SQL injection attack:

The working of SQL injection attack is described as follows:

Basically, the attacker terminates a text string and attaches a new command to it...

Precautions taken to prevent SQL injection attack:

The precautions taken to prevent an SQL injection attack are as follows:

Never concatenate user input values directly into a query string.

Use parameters with Dynamic SQL and particular stored procedures...