1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Svetlanka [38]
3 years ago
15

Referential integrity states that:______.

Computers and Technology
1 answer:
densk [106]3 years ago
7 0

Answer:

D. Each foreign key value MUST match a primary key value in another relation or the foreign key value must be null.

Explanation:

In Computer programming, integrity constraints can be defined as a set of standard rules that ensures quality information and database are maintained.

Basically, there are four (4) types of integrity constraints and these are;

1. Key constraints.

2. Domain constraints.

3. Entity integrity constraints.

4. Referential integrity constraints.

Referential integrity states that each foreign key value must match a primary key value in another relation or the foreign key value must be null.

For instance, when a foreign key in Table A points to the primary key of Table B, according to the referential integrity constraints, all the value of the foreign key in Table A must be null or match the primary key in Table B.

<em>Hence, the referential Integrity constraints ensures that the relationship between the data in a table is consistent and valid. </em>

You might be interested in
300134223+304532264440=
sweet [91]

Answer:

304,832,398,663

hope it helps

3 0
3 years ago
Read 2 more answers
14. In cell B14, create a formula without using a function that adds 1 to the value in cell B12 and then multiplies the result b
vagabundo [1.1K]

Answer:

The formula for the given problem is given below:

= (1+B$12)×B13

Explanation:

Immediately you do one, then you can autofill the formula to the mentioned range B15:B17 and then to C14 to H17

When been done correctly, this is how the formula will look in those cells if you do it correctly.

Check the file attached below to see it.

7 0
3 years ago
Using Matlab programming I need to rotate the line defined by x,y by 45 degrees around 2,2
belka [17]

Answer:

% here x and y is given which we can take as

x = 2:2:10;

y = 2:2:10;

% creating a matrix of the points

point_matrix = [x;y];

%  center point of rotation  which is 2,2 here

x_center_pt = x(2);

y_center_pt = y(2);

% creating a matrix of the center point

center_matrix = repmat([x_center_pt; y_center_pt], 1, length(x));

% rotation matrix with rotation degree which is 45 degree

rot_degree = pi/4;      

Rotate_matrix = [cos(rot_degree) -sin(rot_degree); sin(rot_degree) cos(rot_degree)];

% shifting points  for the center of rotation to be at the origin

new_matrix = point_matrix - center_matrix;  

% appling rotation  

new_matrix1 = Rotate_matrix*new_matrix;          

Explanation:

We start the program by taking vector of the point given to us and create a matrix by adding a scaler to each units with repmat at te center point which is (2,2). Then we find the rotation matrix by taking the roatational degree which is 45 given to us. After that we shift the points to the origin and then apply rotation ans store it in a new matrix called new_matrix1.

4 0
3 years ago
HTML question please help
Pie

Answer:

background-color: (Color)

Explanation:

This is actually CSS coding, as you would code it like:

Body {

background-color: (Color)

}

5 0
3 years ago
Question 8 of 25
denis23 [38]

Answer:

D to Protect sensitive data, Enterprise has certain security features and is mostly used in business settings.

5 0
2 years ago
Other questions:
  • The acronym is used to define the process that allows multiple devices to share a single routable ip address.
    6·1 answer
  • What is the main storage device where the computer stores data?
    15·1 answer
  • What is the basic purpose of Google calendar?
    14·2 answers
  • The concept of ____ refers to the idea that the internet is designed for all content to be treated equally.
    12·1 answer
  • While inserting images, the Picture command is usually used to insert photos from a digital camera, and the Clip Art command is
    7·1 answer
  • Hey does anybody know how to delete history on a school-issued chrome book, I tried to delete it but it won't let you clear your
    7·1 answer
  • For example, consider a file with protection mode 644 (octal) contained in a directory with protection mode 730. How might the f
    9·1 answer
  • While developing a network application, a programmer adds functionally that allows her to access the running program without aut
    14·1 answer
  • What is causing the electricity prices to increase in South Africa?​
    14·1 answer
  • To use the replace feature we can simply just press Carl+h,Carl+c,Carl+r
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!