All categories

3 years ago

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

8.5 question 2 edhesive

dangina [55]

Answer:

Please check the attachment.

Explanation:

Please check the attachment for the program in python.

Download txt

5 0

3 years ago

Describe FIVE significant advantages of web-based applications for an organisation.

masya89 [10]

Answer

There are a lot of advantages of web based applications.

Explanation:

Below are the advantages:

Web based applications can be accessed from device that is connected to the device.
No physical software required to download, install, update or manage which saves a lot of administration work for large companies.
Web based software is compatible with any device or platform. The software is delivered through a browser of the users' choice.
Mobile device applications allow for access to the software when out of the office.
Direct access to latest information for Employees where every they are located.

Apart from these, there are lot more benefits, like quick and easy updates, centralized data where data is secure and easy to backup. We can reach anybody, anywhere in the world.

Business costs are drastically reduced by spending less time talking to customers over the phone.

Online training can be finished at user's own time and risk.

It's available 24 hours a day, 7 days a week

The software is always up-to-date

8 0

3 years ago

Greg is writing a report on becoming an advertising and promotions manager. Complete the report by correctly filling in the miss

zzz [600]

Since Greg wants to become an advertising and promotions manager, he needs to at least gain a (B) bachelor’s degree level of education, since generally, this educational background is expected from individuals who wishes to work in an entry-level position in the field of advertising.

One of the skills that he also needs to develop is (C) communication skills, because he would have to be able to communicate in both written and spoken to develop the advertisements according to the client’s desires.

8 0

3 years ago

How to disable iCloud music library? When I go into settings or music or even iTunes the iCloud music library switch doesn’t pop

Komok [63]

It may be a glitch in the settings, or it may a parental block

8 0

3 years ago

Sam is conducting research for a school project on the American Revolution. Which of the following kinds of software will help w

SOVA2 [1]

Answer:

Students analyze the techniques that make for good storytelling I think. :}

Explanation: