What does a primary key allow a user to do in a database?

PLEASE HELP

Answers

Answer 1

A primary key is the field (or fields) that is often employed to specifically identify each record in a table.

What is the role of this key?

The Primary key is known to be the key that helps a user to be able to form a specific identifier for each row in one's table.

Note that  it helps a person to link your table to other tables and as such, a  primary key is the field (or fields) that is often employed to specifically identify each record in a table.

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Answer 2

Answer: its A

Explanation:


Related Questions

Most practical applications of integer linear programming involve mostly ordinary integer variables and a small number of 0-1 integer variables. only 0-1 integer variables and not ordinary integer variables. a near equal number of ordinary integer variables and 0-1 integer variables. only ordinary integer variables.

Answers

Most practical applications of integer linear programming involve mostly; a. only 0-1 integer variables and not ordinary integer variables.

How to deal with Linear Programming Questions?

Linear programming is defined as a method used to achieve the best outcome in a mathematical model where its' requirements are represented by linear relationships.

Now, Linear programming is useful in a number of different applications and where integer linear programming is involved, it uses only 0-1 integer variables and not ordinary integer variables.

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Identify the places in the code where there are object-oriented concept violations, content coupling, common coupling, control coupling, and stamp coupling situations. In the Directory Management System Submission Document, paste the code segments that correspond to each situation and explain how you would fix object-oriented concept violations, common coupling, control coupling, and content coupling issues.

Answers

In this way, using the knowledge in computational language in JAVA it is possible to write a code that identifies the directories and also the people who own these directories:

Writing the code we have:

import java.util.Scanner;

public class PersonnelDirectory

{

public static void main(String[] args)

{

Personnel per = new Personnel();

totalObjects total = new totalObjects();

Scanner scan = new Scanner(System.in);

String firstN, lastN, middleN;

int empID;

double salary;

int choice = -1;

do{

System.out.println("Welcome to the Personnel Directory Management System");

System.out.println("\n\n\t 1. Add Personel");

System.out.println("\n\t 2. Find Personel");

System.out.println("\n\t 3. Print Names");

System.out.println("\n\t 4. Number of Entries in the Directory");

System.out.println("\n\t Select one of the options above (1, 2, 3, 4)");

choice = scan.nextInt();

scan.nextLine();

switch(choice)

{

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Online banking is a convenience that mostly affects which area of your life?
OA. Personal
B. Social
C. Cultural
OD. Ethical

Answers

Online banking is a convenience that mostly affects this area of a person's life: A. personal.

What is online banking?

Online banking simply refers to a type of technology that is used by financial institutions to offer their customers an opportunity to receive and send money through the Internet.

Some examples of online banking institutions include the following:

MoneygramPayment processorWestern UnionPay-Pal

In conclusion, online banking is a convenience that mostly affects the personal area of a person's life.

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Your dod common access card has a public key infrastructure token approved for access to the.

Answers

Your dod common access card has a public key infrastructure token approved for access to the NIPRNet.

What is NIPRNet?

This is known to be Non-classified Internet Protocol (IP) Router Network (NIPRNet).

It is said to be a kind of an IP network that is often used to pass in and out unclassified information, such as information subject and thus Your dod common access card has a public key infrastructure token approved for access to the NIPRNet.

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Which e-mail netiquette rules did the student break? check all that apply.

limit the use of emoticons.
always proofread before sending.
do not discuss personal information.
do not forward large attachments.
identify yourself by name.

Answers

The e-mail netiquette rules that the student broke are:

Always proofread before sending.Identify yourself by name.Do not reveal personal information.

What are the email netiquette rules?

This is known to be the rules for email etiquette and they are:

The use of a clear, professional subject words.Always Proofread all email that you send. Compose the email before entering the recipient email address and others.

The e-mail netiquette rules that the student broke are:

Always proofread before sending.Identify yourself by name.Do not reveal personal information.

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Answer: The answer for the following email

Hey you guys!!!!!! LOL

A: Limit the use of emoticons

B: Always proofread before sending

E: Identify yourself by name.

Explanation:

I just did it on edge 2022.

The arrangement of keys on a keyboard, QWERTY reflects the keyboard layout by ________. Group of answer choices using the letters of the alphabetic characters that are closest to access while typing taking the letters of the first six alphabetic characters found on the top row of keys using the alphabetic characters most frequently used on the keyboard representing the phonetics of the alphabets most closely associated with the keyboard

Answers

The setup of keys on a keyboard, QWERTY shows the keyboard layout by taking the letters of the first six alphabetic characters found on the top row of keys.

What is keyboard?

A keyboard is known to be a kind of peripheral device that helps a user to be able to input text into any computer or any any kind of electronic device.

Note that The setup of keys on a keyboard, QWERTY shows the keyboard layout by taking the letters of the first six alphabetic characters found on the top row of keys.

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What effect does the sudo iptables --policy INPUT DROP command have on the access to computing resources

Answers

The effect of the sudo iptables --policy INPUT DROP command is that it gives room for system administrators to handle incoming and outgoing traffic.

What does Sudo iptables -- policy input drop command do?

The iptables -P INPUT DROP is known to be an -P switch that places the default policy on any given chain.

When the default policy on the INPUT chain changes to DROP., it implies that an incoming packet did not match one set of the rules and as such, it will have to be dropped.

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Your guardian receives a call similar to the one described in the amazon video. what is one thing they can do to check that it is a legitimate message?

Answers

One thing they can do to check that it is a legitimate message is to see if there is any link for you to click, or numbers to call, this will tell you that it is a scam.

How do you tell if someone is scamming you online?

There are a lot of ways to know online scam. Some include

Unexpected contact. Asking for your personal info.links been posted along with random messages.

Therefore,  One thing they can do to check that it is a legitimate message is to see if there is any link for you to click, or numbers to call, this will tell you that it is a scam.

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A computer program can contain limited number of instructions true or false

Answers

Answer:

true

Explanation:

depending on how it is made

Mediacom Communications has requested you to manage the access to its 802.11 standard wireless networks. A recent instance of errors in transmission has been recorded, and in order to fix this problem, you want to run a cyclical code to check for errors in transmission. In which field of the 802.11 data frame will you run this check

Answers

Based on the above scenario, in frame control field of the 802.11, the data frame will you run this check.

What are the three key 802.11 frame types?

There are 3 types of 802.11 frames which are:

ManagementcontrolData

Therefore, Based on the above scenario, in frame control field of the 802.11, the data frame will you run this check.

See full question below

Mediacom Communications has requested you to manage the access to its 802.11 standard wireless networks. A recent instance of errors in transmission has been recorded, and in order to fix this problem, you want to run a cyclical code to check for errors in transmission. In which field of the 802.11 data frame will you run this check?

a.

Sequence Control

b.

Trailer

c.

Data

d.

Frame Control

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How to turn off parental controls without a password on android?.

Answers

Answer:

Ask your parents.

you are pairing a bluetooth headset to a mobile device. on the device, after finding the device for pairing, what is the next step to take

Answers

Answer:

You can use Bluetooth to connect some devices to your phone without a cord. After you pair a Bluetooth device for the first time, your devices can pair automatically. If your phone is connected to something through Bluetooth, at the top of the screen, you'll see a Bluetooth icon .

This program has a bug. When the green flag is clicked, nothing happens. How would you fix it?
A. Change the number inside the “Move” block
B. Change the number inside the “repeat” block
C. Make the sound louder with the purple block
D. Connect the event block directly to the “repeat” block

Answers

The correct answer is D, if you connect it, the program will operate properly.

pls help!!

Calculate the standard deviation for the following data set: Data Set = 2, 9, 10, 4, 8, 4, 12

Answers

Answer:

4.24

Explanation:

First you find the mean of the data set, which is 7. Then to find standard deviation you have to follow the formula which tells you to subtract the mean from each number under the square root : √(2 - 7)^2 + (9 - 7)^2 + (10 - 7)^2 + (4 - 7)^2 + (8 - 7)^2 + (4 - 7)^2 + (12 - 7). Once you solve the parenthesis you square it, once you square it the negatives won't matter. That will leave you with this : √(25 + 4 + 9 + 9 + 25). The formula tells you to find the sum of those numbers (which is 72) then subtract one from how many numbers there are, 5 - 1 = 4, and divide your sum by that number. So 72 / 4 = 18. Then you find the square root of 18 and that becomes your answer.

Write a class called point that represents a point in 2d plane.
- the constructor accepts the x and y dimensions of the point.
- provide a method getx that returns the x coordinate of a point, and another method gety
that returns the y coordinate of a point.
- provide a method called translate that changes the original coordinates of the point by
adding a given values for x and y coordinates.
- provide a method distanceto that calculates the distance between that point and another
one.
use this equation to calculate the distance math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2))
while the math is a library you should import. where the (x1, y) is the coordinates of the first point
and (x2, y2) is the coordinates of the second point
the output should be like this screenshot

Answers

In this way, writing the code in C++ we can say that it will be possible to make the coordinates on the planes.

Writing the code we have:

#include <iostream>

#include <cmath>

#include <iomanip>

using namespace std;

class Point{

private:

float x;

float y;

public:

Point(){

x = y = 0;

}

Point(float x, float y){

this->x = x;

this->y = y;

}

float getX(){

return x;

}

float getY(){

return y;

}

float getDistance(){

return math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2));

}

string toString(){

return "("(x1, y)","(x2, y2)")";

}

};

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Draw and implement of an organization which have 125 employees. use the following features 1.email services 2.lan communication 3.vlan 4.security 5.storage 6.server

Answers

An organisation usually hires employees which helps in the successful achievement of the goals of the organisation.

Implementation of an organisation

The implementation of an organisation can be carried out using the following features:

Email services: Email address can be assigned to different employees of the organisation.

LAN communication: Local Area Network is used by organisation to connect their computer devices to a server using a common communication line.

VLAN: This is known as Virtual Local Area Network which is created between two LAN's.

Security: This is set up by a company to guide their data from theft.

Storage: This is used by the organisation to store their data.

Server: This is a device that provides internet services to another computer in an organisation.

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Hypertext enables you to navigate through pieces of information by clicking the __________, that connect them.

Answers

What we usually click to open the hypertext is called; Hyperlinks.

What is hypertext?

Hypertext is defined as a form of writing with three characteristics namely;

Discernable free standing content nodes.Links between nodes.The expectation of active choice by readers.

Now, a hyperlink is one that points to a whole document or to a specific element within a document. Hypertext is simply text with hyperlinks which we click to view the hypertext.

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Which Internet protocol (IP) packet fragmentation header field specifies where the fragment belongs in the original datagram

Answers

An Internet protocol (IP) packet fragmentation header field which specifies where the fragment belongs in the original datagram is the fragment offset.

What is the TCP/IP model?

The TCP/IP model is known as the Internet protocol suite or Transmission Control Protocol and Internet Protocol (TCP/IP) model and it can be defined as a standard framework that is designed and developed for the transmission (prepare and forward) of information on the Internet.

In the TCP/IP model, a fragment offset simply refers to an Internet protocol (IP) packet fragmentation header field which is used to specify where the fragment belongs in the original datagram.

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What will be the result from running the following program?
print("Grades")
print(100)
print(93)
print(82)
print("Total")
print(100+93+82)

Answers

Answer:

If this is python

then you will get this from console:

Grades
100
93

82

Total
275

What are the benefits of digital media?

Answers

Answer:

- easy to access

- day to day information updates worldwide

- convenient

- versatility

- accuracy

- cost....etc

Explanation:

Select the correct answer.
Denise is creating a web page about rainforest animals. Her friend has many photos of animals from a trip to Brazil. Denise wants to use some
of those photos for her web page. Which input device is best for transferring photos to her multimedia project?
O A digitizing tablet
OB.
keyboard
OC. graphic pad
OD. digital camera

Answers

I would say a digital camera, I am pretty sure a digitizing tablet and a graphic pad is the same, and a keyboard is pretty useless for this

Select all the correct answers. Javier is preparing his resume for a network enginee list relevant experien El use a fancy font style for aesthetics mention all the certifications achieved list skills related to the job give importance to personal sition. Which three best practices should be employ? Reset Next​

Answers

Answer:

A and C

Explanation:

yes its correct I know what I'm doing

help me help you...........

Answers

Answer:

the 1st answer

Explanation:

come on !

X and Y stand for the x and y coordinates of where to put the object on a grid.


Why does binary addition have a rule for 1 + 1 + 1 if only two numbers
are being added together?

Answers

Answer:

See below

Explanation:

Because sometimes you have to 'carry' a 1 over to the ext column when adding two binary numbers

Example :

 1 1 1

+1 1 1    <==== starting in the first R column add  1 + 1  to get 0 and carry 1

                then the next column you will add   1 + 1 + 1  = 1   and carry 1 again

                    then 1 + 1 + 1= 1  and carry 1 again (to column 4)  to get

1   1  1 0

How did Lamarck's theory of evolution differ from Darwin's?

Lamarck believed animals evolved by passing acquired traits down to offspring.

Lamarck believed species evolved slowly, over millions of years.

Lamarck believed that only vertebrates could evolve.

Lamarck believed that the fossil record was complete.

Answers

Answer:

Lamarck's theory of evolution was wrapped around the fact that in order for the organism to adapt to it's "new" environment it has to change but Darwin's theory was that the organism will change before it's environment does thus it doesn't impact it's change

which two features could be added to a game using an "if () then " block

Answers

The two features could be added to a game using an "if () then " block are:

Using nested If Then blocks.Checks the specific Bid quantity for the instrument.

What does the If Then block mean?

The If Then block is known to be the outputs one of  a given two values, that is as a result of  the value of a Boolean input.

Note that  the input value  is very important and as such, The two features could be added to a game using an "if () then " block are:

Using nested If Then blocks.Checks the specific Bid quantity for the instrument.

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sequence structure is when have a repetition of instructions. true false

Answers

Answer:

false

Explanation:

repedition would be s loop like FOR or WHILE

For browsers to connect to resources on the Internet, the location of the resources must be specified through addresses called ________. Group of answer choices Hypertext Markup Language (HTML) top-level domains (TLDs) uniform resource locators (URLs) hyperlinks

Answers

URL is the right answer

Explanation:

Ive worked in data management

To notify the browser that we have JavaScript code, we should use .............

Answers

Answer:

almost all browsers allow you to type JavaScript code directly into the browser, using something called the “console

write a program to input elements of 4*3matrix and prints its elements properly using array ​

Answers

Answer:

Step by step explanation:

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Suppose that a simple economy produces only four goods and services: sweaters, CDs, sugar, and soft drinks. Assume one half of the sugar is used in making the soft drinks and the other half of the sugar is purchased by households. what is the difference between s8 and 8 s True or false Aging and Disability Services Division (ADSD) does not have funding for on-call or after regular business hours staffing. anyone have any ideas? What is the Length of CG Normally, mortgage brokers have nothing to lose by encouraging you to get a bigger loan than you may be able to afford.TrueFalse = how an author creates humor for effect and uses it to communicate a universal truth. Read the following text and answer the question. Exactly how bad is the job situation going to be? An Organization for Economic Cooperation and Development study concluded that 9% of American jobs are at risk. Two Oxford scholars estimate that as many as 47% of American jobs are at risk. Even the optimistic scenario portends a serious problem. Whatever the case, it will need to be possible, within a few decades, for a life well lived in the U.S. not to involve a job as traditionally defined. A UBI will be an essential part of the transition to that unprecedented world.A Guaranteed Income for Every American,Charles MurrayQuestion: The writer acknowledges potential limitations of sources cited in this passage byA. implying the agenda of each source.B. juxtaposing public and private estimates.C. noting that neither conclusion is proven.D. using the conservative prediction to support his claim.E. highlighting the vast difference in predictions. find the area of the shaded part. The development of a new experimental method is most likely to change a theory if it makes it possible toanalyze samples when they are frozen.perform the experiment in a different lab.obtain and analyze results more quickly.study a larger sample size than before. Cooked poultry must reach what minimum internal temperature for at least 15 seconds?. A bus starts from rest.if the acceleration is 2m/s square, find i.the distance travelledii.the velocity after 2 seconds. In which order do the events occur? Why did Japan bomb Pearl Harbor on December 7th, 1941? The average adult dose of meperidine is 75mg. What dose would be appriopriate for a 10-month-old infant A scale model of a building is 3 inches tall. If the building is 90 feet tall, find the scale of the model. What do the "wings in our pockets and palms" represent? dreams money passports devices based on the prompt, which of these goals should you have in this assignment? check all that apply. in this assignment, you will create a multimedia presentation so that you can communicate your findings from your previous budget assignment. you will describe your budget, explain your reasoning, provide evidence, address opposing perspectives, and educate your audience. to influence your audience to communicate your ideas to explain your reasoning to address other perspectives to create a presentation URGENTFind the area of the triangle. Round your answer to the nearest tenth.A triangle A B C with side A C labeled 15 units and side B C as 7 units. The measure of angle A C B is 96 degrees.The area of the triangle is about (blank) square units. Which book documented the poverty resulting from urbanization in late nineteenth-century new york?.