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
leva [86]
3 years ago
6

Define foreign key. What is this concept used for?

Computers and Technology
1 answer:
makvit [3.9K]3 years ago
7 0

Answer and Explanation:

The foreign key is a column that has been linked in a relational database such as mysql to a primary key in another table. We use the foreign key to show a relationship between 2 tables or more. Out of these two tables, one would have the primary key and another the foreign key. For these keys to be linked, any value that is in each of the foreign and primary keys must match.

You might be interested in
You have a computer at home. The computer is connected to the Internet through a dial-up connection. Every time you connect to t
worty [1.4K]

Hiya!

When you connect to the internet (especially through a dial-up connection), your computer must make the request for network resources. This is usually done through a Modem, a device designed to establish and split the connection among your devices.

Fun fact; a dial up connection uses the same radio frequencies that you would use to talk on the phone; and they're in the audible spectrum. When you start up that connection, the reason all those funny noises happen is because it's "talking" to your ISP over those lines.

Hope this helps!

3 0
3 years ago
Circular errors are caused by adding the cell name of _______ cell to its own formula.
Sati [7]

Circular errors are caused by adding the cell name of the active cell to its own formula.

8 0
3 years ago
Explain how communication facilitate cordination​
Oksana_A [137]

Answer:

Communication greatly helps in coordination. Effective communication facilitates information and exchange of ideas which helps to achieve the common purpose. Coordination is facilitated by exchange of such ideas and information and brings people together.

Explanation:

4 0
3 years ago
Please help lots of points worth
Artemon [7]

Answer:

i dont rlly know the first one i mean i guess you cud say the last one? i dunno  srry but the 2nd one is definitively    is Laura woke up to the alarm clock screaming

Explanation:

6 0
3 years ago
Join array elements to form a string.
Vera_Pavlovna [14]

Answer:

2b2t

Explanation:

2b2t

3 0
3 years ago
Other questions:
  • Array testGrades contains NUM_VALS test scores. Write a for loop that sets sumExtra to the total extra credit received. Full cre
    10·1 answer
  • Sam wants to move across the text in his documents to add data at predefined stops. Which key will he use to navigate through th
    13·2 answers
  • Internet-filtering software that electronically blocks out websites in specific rating categories is called _____________ by tho
    9·1 answer
  • Which of these is an example of an integrated presentation?
    10·1 answer
  • Reasons for the growth of decision-making systems include:
    13·1 answer
  • Use rounding to decide if the answer is reasonable. Write
    15·1 answer
  • Modify the NumberedList class we implementd during the lecture by adding a member function: void NumberedList::insertPosition(in
    13·1 answer
  • Cómo se hacían antes las cosas que hoy en día se hacen apoyadas en aplicaciones y software?
    10·1 answer
  • Which file extension would be used to indicate a webpage document?.
    12·1 answer
  • which type of virtual machine (vm) takes advantage of unused capacity in data centers at a much lower cost than regular vms of s
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!