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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:

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Uses of prototype and who made the prototype<br>​
myrzilka [38]

Answer:

A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and software programming. A prototype is generally used to evaluate a new design to enhance precision by system analysts and users.

Explanation: The place that made prototype was Radical Entertainment.

Hoped this helped.

3 0
3 years ago
When comparison shopping, all of these hint at a good deal EXCEPT_____________________.
pav-90 [236]

Answer:

lower-priced models offer more features

Explanation:

4 0
3 years ago
What are the paragraph different formatting paragraph tools?draw its icon and state its function.
aliya0001 [1]

Theres Tab, And File


:)

7 0
3 years ago
Your company has decided to implement a wireless network. The wireless network users must be able to connect to resources on you
Brums [2.3K]

Options:

A Infrastructure mode

B Ad hoc mode

C a wireless access point

D static IP addresses

E APIPA

Answer:

A. Infrastructure mode

C. a wireless access point

Explanation: A DHCP is a server that makes use of s standard protocol called dynamic host configuration protocol to automatically assign internet protocol (IP) addresses and other computer parameters to clients. It gives them the opportunity to effectively make use of other network services such as DNS( domain name system) and NTP(network time protocol).

8 0
3 years ago
When you code a column list in an INSERT statement, you can omit columns with default values and columns that allow ____________
stiks02 [169]

Answer:

NULL is the correct answer of this question.

Explanation:

The insert statement is used for inserting a column list into the database this statement is an under Data Manipulation language.When we insert any column into the database there is always a null value stored.

  • Insert statement is used to insert the data into the database .
  • To insert data following syntax is used:-

         insert into tablename (column data type).

  • When we insert any data into the database the default value is stored is bull.
6 0
3 years ago
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