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
Write two cin statements to get input values into birthMonth and birthYear. Then write a statement to output the month, a dash,
snow_lady [41]

Answer:

// here is code in c++.

#include <bits/stdc++.h>

using namespace std;

// main function

int main() {

// variables to read birth month and year

int birthMonth,birthYear;

cout<<"Enter the birth month:";

// read the birth month

cin>>birthMonth;

cout<<"Enter the birth Year:";

// read the birth year

cin>>birthYear;

// print the output

cout<<birthMonth<<"-"<<birthYear<<endl;

return 0;

}

Explanation:

Declare two variables "birthMonth" and "birthYear". Read the value of birthMonth and birthYear from user. Then print the birth month and birth year and a dash(-) in between them.

Output:

Enter the birth month:1                                                                                                                                      

Enter the birth Year:2000                                                                                                                                    

1-2000  

Enter the birth month:5                                                                                                                                      

Enter the birth Year:1950                                                                                                                                    

5-1950

6 0
3 years ago
When you run __________ on your hard drive, files are reorganized, making the hard drive work more efficiently.
andre [41]

Answer:

Disk Defragmenter

Explanation:

6 0
2 years ago
Which of the following is not ways to fix software in windows 8
RideAnS [48]
Well, this is pretty tricky so lets define all the purposes of these

Safe mode - troubleshoots windows ; determines HARDWARE malfunctions

Check device manager - Highlights malfunctioning hardware that is connected to the P.C.

Refreshing pc - practically nothing

resetting your pc - removes all programs, files, etc. and starts as a new Windows.

I will have to go with answer C.) Refresh your P.C.
7 0
3 years ago
Consider the following scenario. The Current State of One Particular ArrayList The capacity of a particular ArrayList is five (5
pshichka [43]

Answer:

The ArrayList initial functionality is 5, there were 4 components.

Then, add 25 more elements by using add()calling 25 times So total number of elements after the completed operation would be 4 + 25= 29.

5th component will be introduced without calling ensureCapacity(); while adding 6th element-> ensureCapacity(2* 5+ 1) it will call, making the capacity 11.

So ArrayList's capacity will be 11.

Next 7th to 11th components will also be added automatically once the 12th element is added, it will name ensureCapacity(2* 11+ 1) and make the capacity 23.

While adding 24th dimension, ensureCapacity(2* 23+ 1) will be called again and this will make the capacity 47.

There will therefore be 3 (three) calls to ensure the feature Ability).  

Elements of Rest 25th to 29th will be added seamlessly as ability becomes 47.

3 0
3 years ago
What trends do you see in the industry in 2010? For example, if there were more or fewer jobs created by travel and tourism, rep
Setler [38]

Answer:

i saw phones and more social media being used mobile gaming was also invented

Explanation:

me smart birb

4 0
3 years ago
Read 2 more answers
Other questions:
  • A peripheral can be used to tell a computer to complete a specific task. True False
    15·1 answer
  • Need help with this please and thanks
    7·1 answer
  • Many who enter the field of information security are technical professionals such as __________ who find themselves working on i
    13·1 answer
  • What are 3 characteristics of syndrome E?
    13·1 answer
  • Sharon is a skilled professional who operates logging equipment.
    12·2 answers
  • U
    11·1 answer
  • What humidity level should be maintained for computing equipment? a. 50 percent b. 40 percent c. 60 percent d. 30 percent
    12·1 answer
  • In 3-5 sentences describe to me in detail how you can make a change and better our online community. What are steps would you ta
    8·2 answers
  • Which type of information should never be given out on social media?
    5·2 answers
  • Importance/Role of the information systems in Education​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!