a. Predicate generated: The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

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Answer 1

Expert Solution & Answer

Chapter 9, Problem 22E

Explanation of Solution

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Explanation of Solution

b.

SQL Query:

Consider the following query:

select * from takes;

Explanation of Solution

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

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Answer 2

Expert Solution & Answer

Chapter 9, Problem 22E

Explanation of Solution

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Explanation of Solution

b.

SQL Query:

Consider the following query:

select * from takes;

Explanation of Solution

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Expert Solution & Answer

Chapter 9, Problem 22E

Explanation of Solution

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Explanation of Solution

b.

SQL Query:

Consider the following query:

select * from takes;

Explanation of Solution

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Expert Solution & Answer

Chapter 9, Problem 22E

Explanation of Solution

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Explanation of Solution

b.

SQL Query:

Consider the following query:

select * from takes;

Explanation of Solution

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

Expert Solution & Answer

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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 9, Problem 22E

Explanation of Solution

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Explanation of Solution

b.

SQL Query:

Consider the following query:

select * from takes;

Explanation of Solution

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

Answer 8

Chapter 9, Problem 22E

Explanation of Solution

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Answer 9

Chapter 9, Problem 22E

Explanation of Solution

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Answer 10

Explanation of Solution

b.

SQL Query:

Consider the following query:

select * from takes;

Answer 11

Explanation of Solution

b.

SQL Query:

Consider the following query:

select * from takes;

Answer 12

Explanation of Solution

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

Answer 13

Explanation of Solution

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

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

a. Predicate generated: The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Explanation of Solution

a. Predicate generated: The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

Explanation of Solution

b. SQL Query: Consider the following query: select * from takes;

Explanation of Solution

c. SQL Query: The following query gives a result tuple that is not in the result of the original query: select count(*) from takes; The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...

Want to see the full answer?

Chapter 9 Solutions

a.

Predicate generated:

The following predicate can be added to queries on takes, to ensure that each faculty member only sees takes tuples corresponding to course sections that they have taught. The predicate assumes that syscontext.user_id() returns the instructor identifier...

b.

SQL Query:

Consider the following query:

select * from takes;

c.

SQL Query:

The following query gives a result tuple that is not in the result of the original query:

select count(*) from takes;

The aggregated function above can be any of the aggregate functions, such as sum, average, min or max on any attribute...