Question: What is the foreign key constraint? (5 marks) Please give an example to explain set difference of two relations. (5 marks)

What is the foreign key constraint? (5 marks) Please give an example to explain set difference of two 

What is the foreign key constraint? (5 marks) Please give an example to explain set difference of two relations. (5 marks)

Step by Step Solution

★★★★★

3.38 Rating (142 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Q:

Simmonds Products has spent $158,500 (sunk cost) on research to develop low-fat imitation wine. The firm is planning to spend $210,000 on a machine to produce new wine. Shipping cost of $60,000 and...

Q:

1. What is the primary role of internal auditing in a multinational corporation? A) To assist the external auditors in completing the financial statement audit in a timely fashion B) To make sure...

Q:

List three specific parts of the Case Guide, Objectives and Strategy Section (See below) that you had the most difficulty understanding. Describe your current understanding of these parts. Provide...

Q:

2. (40 points) The following database schema is part of a bank database Branch(bname, bcity, assets) Account(accountNo, bname, balance) Client(cID, cname, cstreet, c_city) Loan(loanNo, bname, amount)...

Q:

COMPLETE ALL THE QUESTIONS 1) Make a version of X.32[7] where the element type is a template argument. [10] ( 2.5) Given an Itor class like the one in X.32[8], consider how to provide iterators for...

Q:

Question - In the context of solving the problem with a bottom-up dynamic programming algorithm. . . NOT NCESSARY INFORMATION For the following problem: A car must race from point A to point B along...

Q:

1. Consider the 4 relations, namely, student, takes, section, and course in the relational database schema above. Answer the following questions while keeping the efficiency and answer correctness in...

Q:

How many bracketings of length 2n will there now be? 1 [TURN OVER CST.93.2.2 2 Two teams A and B play a match in which the winner is the first team to win n games. If A needs i games to win and B...

Q:

For the network from Exercise 4 calculate the conditional probability P r(p1|p2, p3) again. Apply a sampling approximate method. Discuss pros and cons of rejection sampling, likelihood weighting and...

Q:

Multinational Business Machine ("MBM") has two subsidiaries, MBM France in Toulouse and MBM Japan in Kobe. The parent firm MBM USA expects MBM France to repatriate 20 million euros (EUR) of its cash...

Q:

Solve the differential equation: y + y = cosec x dx

Q:

The Graduates moved forward with their purchase and loan from a major lender. They have stabilized the cash flow and have maintained the net operating income from above. They have reached out to a...

Q:

HBO has never had traditional advertising breaks during original programming, but brands can still receive exposure through q , For example, in the 2 0 2 0 HBO Max series, ' We Are Who We Are, '...

Q:

Let R Nk be a k-ary relation. Say that R is definable in Th(N,+) if we can give a formula with k free variables x 1 , . . . , x k such that for all a1, . . . , a k N, (a 1 , . . . , a k ) is true...

Q:

The ______ is the functional currency of a foreign subsidiary with operations that are relatively self-contained and integrated within the country in which it is located. In such cases, the ______...

Q:

find Io (t),t>0 in the network.

Q:

Write the given differential equation in the form L(y) = g(x), where L is a linear differential operator with constant coefficients. If possible, factor L. 2y'' 3y' 2y = 1

Q:

You e-mail a classmate in this course for some information about a spreadsheet homework problem. In addition to answering your question, your classmate also attaches a spreadsheet solution to the...

Q:

Employers can obtain background information from a variety of sources such as an applicanfs motor velucle reconds and military reconds.TrueFatse

Q:

Consider the relation shown in Figure 30.2(d). How would it appear to a user with classification U? Suppose that a classification U user tries to update the salary of Smith to $50,000; what would be...

Q:

What is meant by navigational, informational, and transformational search?

Q:

What are Apache Tez, Apache Giraph, and Hoya?

Q:

For each of the sinking funds, calculate (rounded to the nearest dollar): a. The size of the periodic sinking fund payment. b. The balance in the sinking fund at the time indicated in the last...

Q:

For each of the sinking funds, calculate (rounded to the nearest dollar): a. The size of the periodic sinking fund payment. b. The balance in the sinking fund at the time indicated in the last...

Q:

For each of the sinking funds, calculate (rounded to the nearest dollar): a. The size of the periodic sinking fund payment. b. The balance in the sinking fund at the time indicated in the last...