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
Marianna [84]
2 years ago
6

Short notes on primary key​

Computers and Technology
1 answer:
Thepotemich [5.8K]2 years ago
5 0

Answer:

A primary key is a special relational database table column (or combination of columns) designated to uniquely identify each table record. A primary key is used as a unique identifier to quickly parse data within the table. A table cannot have more than one primary key.

Primary Key.

Candidate Key.

Alternate Key.

Super Key.

Composite Key.

Foreign Key.

Unique Key.

In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation. Informally, a primary key is "which attributes identify a record," and in simple cases constitute a single attribute: a unique ID.

Explanation:

You might be interested in
When conducting research on the internet, what is a starting point for determining how to start the research?
Alex787 [66]
It depends on what you're researching for.
4 0
3 years ago
You decide to bulk upload your multiple business locations to Google My Business. Some of the locations in your upload were disa
koban [17]

Complete Question: You decide to bulk upload your multiple business locations to Google My Business. Some of the locations in your upload were disapproved. Which two errors can cause this issue? (Choose two.)

A    Missing listing photos

B  Late listing registration

C   Multiple locations in one physical address

D  Too many listing users

E  Incorrect business name

Answer:

C) Multiple locations in one physical address

E) Incorrect business name

Explanation:

Google provides a service called Google My Business which allows users  with the aid of special tools create, update and maintain their business profiles on the internet. In this way, users are able to build free simple websites and publish posts to engage their customers more effectively.

In the process of signing up for this service, new users are required to verify their business names and physical locations, In the given question a user trying to upload multiple business locations will not get approval if he uploads Multiple locations in one physical address or enters an Incorrect business name.

4 0
3 years ago
PLEASE help me i dont get this at all
zepelin [54]

Answer:

dont know dont really care

Explanation:

6 0
2 years ago
Read 2 more answers
What is one current method of detecting planets orbiting around other stars?
Gnoma [55]
C

D is the old way.

A they have not done yet

B not even a thing
5 0
3 years ago
What are the other number systems? and how to convert binary numbers to their decimal equivalent.?
Mrrafil [7]
In computers we use: decimal constantly, hexadecimal daily, octal weekly and binary monthly.  Decimal is base 10, hexadecimal is base 16, octal is base 8 and binary is base 2.

To convert binary to decimal, simply add the magnitudes of the digits that are set.
7 0
3 years ago
Other questions:
  • Which of the following should you do if you are exhibiting your photographs?
    14·1 answer
  • Discuss FOUR challenges that have an impact on domestic tourism
    6·1 answer
  • Which of the following is true about radio waves? They have short wavelengths. They have high energies. They reveal hot gases. T
    10·2 answers
  • How do you customize Track Changes in a text document?
    11·1 answer
  • What best describes presentation software?
    14·1 answer
  • Technician A says that a lead acid battery uses straight Hydrochloric acid for electrolyte. Technician B says that a lead acid b
    10·2 answers
  • Write a program that prompts the user to enter a grade, which is aninteger in the range of 0 - 100. Using if statements, have th
    11·1 answer
  • Match each code snippet to its appropriate markup language name
    12·1 answer
  • please help me to do this computer homework I beg you all please help me to get the answers please its important please ​
    12·1 answer
  • Question 1 Fill in the blank: Internet search engines are an everyday example of how Boolean operators are used. The Boolean ope
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!