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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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This is because, beamforming helps to deliver higher signal quality to the target receiver.

<h3>What is beamforming?</h3>

beamforming can be regarded as application of different radiating elements that is transmitting the same signal.

This signal is usually identical in wavelength and phase, and  by reinforcing the waves in a specific direction the goal can be acheived.

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what is the question? it just seems like directions

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Assume you are given three variables, revenue, expenses, and profit, all of type Money (a structured type with two int fields, d
Andre45 [30]

Answer:

if(revenue.cents - expenses.cents < 0){

profit.dollars = revenue.dollars - expenses.dollars - 1;

profit.cents = 1 - revenue.cents - expenses.cents;

}

else{

profit.dollars = revenue.dollars - expenses.dollars;

profit.cents = revenue.cents - expenses.cents;

}

Explanation:

We know that profit is given as: revenue - expenses from the question.

From the given expression above;

if(revenue.cents - expenses.cents < 0)

then profit.dollar will be revenue.dollars - expenses.dollars - 1; the 1 is to be carry over to the cent part. And the profit.cent will be 1 - revenue.cents - expenses.cents;

else the profit.dollars and the profit.cent is computed directly without needing to carry over:

profit.dollars = revenue.dollars - expenses.dollars;

profit.cents = revenue.cents - expenses.cents;

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The user's browser renders the html code as a visual web page
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torisob [31]

Answer:

The correct option is Option B

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Client Side code: The part of code, that doesn't require server for performing specific task

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