Combination of one or more columns used to identify particular rows in a relation is a (n)

Answers

Answer 1

Answer:

Combination of one or more columns used to identify particular rows in a relation is a key

Answer 2

A key is a combination of one or more columns that is used to identify particular rows in a relation.

KEYS in DBMS (database management system) is an attribute or set of attributes which helps you to identify a row in a relation(table). They allow you to find the relation between two tables.

Keys help you uniquely identify a row in a table by a combination of one or more columns in that table. Key is also helpful for finding unique record or row from the table.

Database key is also helpful for finding unique record or row from the table.

Find out more on DBMS at: https://brainly.in/question/1919695


Related Questions

Write your own printArray() function found in Processing for the Arduino. For simplicity, you can limit printArray() to integer arrays and you will also pass the size of the array to your function. For example, given the following code:

int terps[5] = {7, 9, 12, 1, 46};
void printArray(int arrayToPrint[], int arraySize) { // YOUR CODE HERE }
void setup()
{ // put your setup code here, to run once:
Serial.begin(9600);
}
void loop() {
// put your main code here, to run repeatedly:
printArray(terps,sizeof(terps)/sizeof(int)); delay(1000);
}

You should repeatedly see the following in the serial monitor:

[0]: 7
[1]: 9
[2]: 12
[3]: 1
[4]: 46

Answers

Answer:

Follows are the method definition to this question:

void printArray(int arrayToPrint[], int arraySize) //defining a method printArray that accepts two array in its parameters

{

for (int j = 0; j < arraySize; j++)//defining for loop print Serial numbers

{

Serial.print("[");//use print method to print square bracket

Serial.print(j);//use print method to print Serial numbers

Serial.print("]: ");//use print method to print square bracket

Serial.println(arrayToPrint[j]);//printing array value

}

}

Explanation:

In the above code, a method "printArray" is declared that holds two arrays "arrayToPrint and arraySize" as a parameter, and inside the method is used for loop to print the values.

In the loop, first, it uses the square bracket to print the serial number and in the last step, it prints array values.

How is QA done in agile projects

Answers

200+300-500.

Explanation:

rjfnvkfjfhfofgfohgighghgiggh

Which situations are the most likely to use telehealth? Select 3 options.

Your doctor emails a suggested diet plan.

Your brother was tested for strep throat and now you think you have it.

Your doctor invites you to use the patient portal to view test results.

You broke your arm and need a cast

You request an appointment to see your doctor using your health app.

Answers

Answer:

Your doctor emails a suggested diet plan.

Your brother was tested for strep throat and now you think you have it.

Your doctor invites you to use the patient portal to view test results.

Answer:

Your doctor emails a suggested diet plan

You request an appointment to see your doctor using your health app

Your doctor invites you to use the patient portal to view test results

Explanation:

Edge 2022

Hello! So I have been practising some coding, however, there seems to be an error in my code. I have been trying to figure out what is wrong, however, I just can't seem to find it. There is no syntax error but, there seems to be a problem with my input. I am currently using repl.it and I am making a calculator. I would input something like "multiply" however, the calculator would only square. I have tried changing the variables but it just keeps coming back to the first "if" statement. I would appreciate some help.

Answers

Answer:

You OR expressions are wrong.

Explanation:

Rather than writing:

  if method == "Square" or "square":

You should write:

  if method == "Square" or method == "square":

The expression should evaluate to something that is true or false.

In the above case, the expression is method == "Square" or method == "square" which can are actually two sub-expressions with an or in between them:

subexpr1 or subexpr2

each of the sub-expressions should evaluate to true or false.

method == "Square" is one of those sub-expressions.

That is how an expression is broken down by the compiler.

TIP: If you would add method = method.lower() right after the input, you could simplify all the if statements by removing the uppercase variants.

Difference between a port and a connector

Answers

Explanation:

A connector is the unique end of a plug, jack, or the edge of a card that connects into a port. Port: The port has either holes or a slot that matches the plug or card being connected into the port. For example: cables are plugged into Ethernet ports, and cables and flash drives are plugged into USB ports.

5.18 LAB: Output numbers in reverse Write a program that reads a list of integers, and outputs those integers in reverse. The input begins with an integer indicating the number of integers that follow. For coding simplicity, follow each output integer by a comma, including the last one. Ex: If the input is: 5 2 4 6 8 10 the output is: 10,8,6,4,2, To achieve the above, first read the integers into a vector. Then output the vector in reverse.

Answers

Answer:

In C++:

#include<iostream>

#include<vector>

using namespace std;

int main(){

   int len, num;

   vector<int> vect;

   cout<<"Length: ";

   cin>>len;  

   for(int i = 0; i<len;i++){

       cin>>num;

   vect.push_back(num);}

   vector<int>::iterator iter;

   for (iter = vect.end() - 1; iter >= vect.begin(); iter--){

       cout << *iter << ", ";}    

}

Explanation:

This declares the length of vector and input number as integer

   int len, num;

This declares an integer vector

   vector<int> vect;

This prompts the user for length  

cout<<"Length: ";

This gets the input for length  

   cin>>len;  

The following iteration gets input into the vector

   for(int i = 0; i<len;i++){

       cin>>num;

   vect.push_back(num);}

This declares an iterator for the vector

   vector<int>::iterator iter;

The following iterates from the end to the beginning and prints the vector in reverse

   for (iter = vect.end() - 1; iter >= vect.begin(); iter--){

       cout << *iter << ", ";}

The objective of this task is to use Scapy to estimate the distance, in terms of number of routers, between your VM and a selected destination. This is basically what is implemented by the traceroute tool. In this task, we will write our own tool. The idea is quite straightforward: just send a packet (any type) to the destination, with its Time-To-Live (TTL) field set to 1 first. This packet will be dropped by the first router, which will send us an ICMP error message, telling us that the time-to-live has exceeded. That is how we
This project is based on SEED labs by Wenliang Du, Syracuse University.
get the IP address of the first router. We then increase our TTL field to 2, send out another packet, and get the IP address of the second router. We will repeat this procedure until our packet finally reach the destination. It should be noted that this experiment only gets an estimated result, because in theory, not all these packets take the same route (but in practice, they may within a short period of time). The code in the following shows one round in the procedure
a = IP()
a.dst '1.2.3.4
a.ttl = 3
b = ICMP()
send (a/b)
If you are an experienced Python programmer, you can write your tool to perform the entire procedure automatically. If you are new to Python programming, you can do it by manually changing the TTL field in each round, and record the IP address based on your observation from Wireshark. Either way is acceptable, as long as you get the result
Task: Sniffing and-then Spoofing
In this task, you will combine the sniffing and spoofing techniques to implement the following sniff- and-then-spoof program. You need two VMs on the same LAN. From VM A, you ping an IP X. This will generate an ICMP echo request packet. If X is alive, the ping program will receive an echo reply, and print out the response. Your sniff-and-then-spoof program runs on VM B, which monitors the LAN through packet sniffing. Whenever it sees an ICMP echo request, regardless of what the target IP address is, your program should immediately send out an echo reply using the packet spoofing technique. Therefore, regard-less of whether machine X is alive or not, the ping program will always receive a reply, indicating that X is alive. You need to use Scapy to do this task. In your report, you need to provide evidence to demonstrate that your technique works.

Answers

Answer:

kad ;ikajlfhdakjsfhadskfadhkjfahdjkfadk a jk h

Explanation:

Answer:

is this even a legit question

You are going on vacation and want to take some work files. You need a storage device that is small enough to fit in your bag and preferably one that does not have plugs. Which device should you bring?


hard drive bus

flash drive

external hard drive

storage card

Answers

Answer:

Flash drive

Explanation:

2. BIOS is contained in ROM and not in RAM. Can you guess why?​

Answers

Answer:

Because RAM is only used for short term storage (and doesn't contain anything that will need to be accessed often) RAM it loses its contents when turned off. So when you power on a computer, it has to start running bootup code which has to be stored in ROM

To copy an item, you would:
O Highlight the item, right click, and select copy
O Press Ctrl + X
O Press Ctrl + Z
O Highlight text​

Answers

The first one (Highlight the item, right click, and select copy)
You would highlight the item, right click, and select copy to copy an item which is the first option!

Cole has to edit and resize hundreds of photographs for a website. Which Adobe

software program would be the best choice to complete this task?

a.) Animate b.) Dreamweaver c.) Illustrator d.) Photoshop​

Answers

D.) Photoshop

Hope this helped, have a great day

What is computer science​

Answers

Answer:

computer science is the study of computer and computing as well as theoretical and practical applications.

pls give me thanks ☺️☺️

what, if anything, is returned by the method call rearrange ("apple")?

Answers

Answer:

[tex] \boxed{E} \to \boxed{nothing \: is \: returned \: due \: to \: run \: tie \: error}[/tex]

It is important to create a strong password because it will

let someone steal your personal information
allow your friends to easily guess it
keep your private information safe and secure
give your computer a virus

Answers

Keeps your private information safe and secure...
PLP 2021

Suppose you present a project and your supervisor comments that the graphics need to be a higher quality and suggests you replace a circuit board. To what circuit board is your supervisor referring?


graphics card

video card

sound card

system card

Answers

Answer:graphics card

Explanation:

Answer:

graphics card

Explanation:

which among the following if absent, a computer is not complete.
A. mouse
B. DVD
C. user
D. projector

Answers

i think mouse is the correct answer

Answer:

user because all the other things the computer need

In Linux, users are internally represented using a unique number called user ID or uid.

a. True
b. False

Answers

Answer:

a. True

Explanation:

An operating system is a system software pre-installed on a computing device to manage or control software application, computer hardware and user processes.

This ultimately implies that, an operating system acts as an interface or intermediary between the computer end user and the hardware portion of the computer system (computer hardware) in the processing and execution of instructions.

Some examples of an operating system on computers are QNX, Linux, OpenVMS, MacOS, Microsoft windows, IBM, Solaris, VM etc.

In Linux, users are internally represented using a unique number called user ID or UID. Thus, this unique number serves as an internal identifier in the Linux Kernel and as such determines what system resources may be accessible to each user. Oftentimes, these unique numbers are not put into use but rather a name is linked with the number and are used instead.

Also, users can be organized logically into a group and are represented uniquely with a group ID or GID, which serves as a global identifier for the users.

full meaning of ENDVAC

Answers

Answer:

EDVAC was one of the earliest electronic computers. Unlike its predecessor the ENIAC, it was binary rather than decimal, and was designed to be a stored-program computer. ENIAC inventors John Mauchly and J. Presper Eckert proposed the EDVAC's construction in August 1944.

Explanation:

Here is the full meaning

Which of the following algorithms is the same as the flowchart shown below?
Start
mylum - RANDOM(1,10)
false
DISPLAY("Done
DISPLAY()
O Amylum - RANDOM (1, 19)
IF (byllum > 8)
(
DISPLAY("Done")
ELSE
(
DISPLAY(myNum)
}
OB. myllum - RANDOM(1, 18)
REPEAT UNTIL (byllum > 8)
{
DISPLAY(myNum)
myllum - RANDOM(1,18)
}
DISPLAY("Done")
Octylum - RANDOM(1, 18)
IF (myllum < 8)
{
DISPLAY("Done")
ELSE
{
DISPLAY(myllum)
)
O D. myllum - RANDOM(1, 18)
REPEAT UNTIL (myNun > 8)
{
DISPLAY("Done")
DISPLAY(byllum)

Answers

Answer:

choice b

Explanation:

The algorithms are the same as the flowchart shown below is myllum - RANDOM(1, 18), REPEAT UNTIL (byllum > 8) { DISPLAY(myNum)myllum - RANDOM(1,18)} DISPLAY("Done"). The correct option is B.

What is an algorithm?

The definition of algorithms in computer science. An algorithm is a list of instructions used in computer science to solve problems or carry out activities based on knowledge of potential solutions.

Think of a "black box," or a container where nobody can see what is occurring within. The box accepts our input and produces the output we require, but the process by which input is transformed into the intended output—and which we may need to understand—is an ALGORITHM.

Therefore, the correct option is B. myllum - RANDOM(1, 18)REPEAT UNTIL (byllum > 8){DISPLAY(myNum)myllum - RANDOM(1,18)}DISPLAY("Done").

To learn more about an algorithm, refer to the link:

https://brainly.com/question/22984934

#SPJ5


Write a function solution that, given an integer N, returns the maximum possible
value obtained by inserting one '5' digit inside the decimal representation of integer N.
Examples:
1. Given N = 268, the function should return 5268.
2. Given N = 670, the function should return 6750.
3. Given N = 0, the function should return 50.
4. Given N = -999, the function should return - 5999.
Assume that:
• N is an integer within the range (-8,000..8,000).
In your solution, focus on correctness. The performance of your solution will not be the
focus of the assessment.
Copyright 2009-2021 by Codility Limited. All Rights Reserved. Unauthorized copying, publication or
disclosure prohibited

Answers

You did not specified the language, so I did my program in python.

Hope it helps!!!

Select the correct answer.

The idea that different aspects of health influence each other is known as _____ .

A.

Holistic health

B.

Happy health

C.

Integral health

D.

Perfect health

Answers

Answer:

A.  Holistic health

Explanation:

Holistic health refers to the method of caring the entire body. It includes physical, mental and emotional health of the individual. The overall health of an individual depends on the fitness of al these aspects of the body. The mind, body and the soul are considered to be interdependent and therefore the fitness of the body depends on the fitness of all of these parts.

Answer:

A

Explanation:

The definition of holistic is relating to the idea that things should be studied as a whole and not just as a sum of their parts. An example of holistic is health care that focuses on the health of the entire body and mind and not just parts of the body.

I have a question about this programming assignment. The outcome when the user puts in Taylor for guest one and Fernando for guest 2 should be, "Your party is ruined and another bad pop song will be written." However, it does not. What do I add to get this outcome? Do I need more brackets?

Answers

Yes u need more brackets

Use guestNumber1.equals(Fernando) instead of the double equal signs. You cant compare strings with ==

1, How can technology serve to promote or restrict human rights? [2 points]

Answers

Answer:

Examples of how technology can be used as a powerful tool for human rights are ever expanding. Newer technologies such as artificial intelligence, automation, and blockchain have the potential to make significant positive contributions to the promotion and protection of human rights.

what is ergonomic in computer science​

Answers

Answer:

Ergonomics is the science of fitting jobs to people. One area of focus is on designing computer workstations and job tasks for safety and efficiency. Effective ergonomics design coupled with good posture can reduce employee injuries and increase job satisfaction and productivity.

How to write an algorithm to read and print a name?
I want the steps please

Answers

Answer:

Step 1: Obtain a description of the problem. This step is much more difficult than it appears. ...

Step 2: Analyze the problem. ...

Step 3: Develop a high-level algorithm. ...

Step 4: Refine the algorithm by adding more detail. ...

Step 5: Review the algorithm.

Explanation:

Write a python program that gets a number using keyboard input. If the number is positive, the program should call countdown

Answers

Answer:

def countdown():

 print("This is countdown")

number = int(input("Enter number: "))

if (number > 0):

 countdown()

Explanation:

This is literally what you asked, but what is the purpose?

. A digital computer has a memory unit with 24 bits per word. The instruction set consists of 150 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory.
a) How many bits are needed for the opcode?
b) How many bits are left for the address part of the instruction?
c) What is the maximum allowable size for memory?
d) What is the largest unsigned binary number that can be accommodated in one word of memory?

Answers

Explanation:

d answer

gzjxubejeiizbtozueg

Create the HTML code for this
1.Font size for the text is 20px2.Background color for table dataiscyan and table headeris lightgrey.3.Text is center aligned.4.Height of the table is 200px andwidth is 500px.5.Border thickness 2px,colour black and collapsed

Answers

Answer:

index.html:

<!DOCTYPE html>

<html>

 <head>

   <title>Brainly</title>

   <link href="style.css" rel="stylesheet" type="text/css" />

 </head>

 <body>    

   <table id="myTable">

     <caption>Duty Roster for last two days</caption>

     <tr><th>Day</th><th>Morning</th><th>Afternoon</th></tr>

     <tr><td>Monday</td><td colspan="2">John</td></tr>

     <tr><td>Tuesday</td><td rowspan="2">Tom</td><td>Peter</td></tr>

     <tr><td>Wednesday</td><td>simon</td></tr>

   </table>

 </body>

</html>

style.css:

#myTable {

 background-color: Cyan;

 border-collapse: collapse;  

 height: 200px;

 width: 500px;

 font-size: 20px;

}

#myTable td,th {

 border: 2px black solid;

 text-align: center;

}

#myTable td:first-child, th {

 background-color: lightgray;

 font-weight: bold;

}

Write a program that computes how much each person in a group needs to pay (after tax and tip) when splitting the bill equally. Specifically, your program should: 1. Ask a user for the number of people in the party 2. Ask a user for the total bill amount before tax and tip 3. Output the amount due per person after tax and tip Assume that tax is 7.25%, and tip is 20% (tip is before tax).

Answers

Tax is an incredibly weird thing but I wish I could help but I can’t

You are given the following segment of code:Line 1: PROCEDURE printScorePairs()Line 2: {Line 3: count <-- 0Line 4: sum <-- 0Line 5: i <-- 1Line 6: scores <-- [73, 85, 100, 90, 64, 55]Line 7: REPEAT UNTIL ( i > LENGTH (scores) )Line 8: {Line 9: sum <-- scores[i] scores[i 1]Line 10: DISPLAY ( sum )Line 11: i <-- i 2Line 12: }Line 13: }The ABC company is thrifty when it comes to purchasing memory (also known as RAM) for its computers. Therefore, memory is of the utmost importance and all programming code needs to be optimized to use the least amount of memory possible. What modifications could be made to reduce the memory requirements without changing the overall functionality of the code?

Answers

Answer:

Move Line 10 to after line 12

Explanation:

Required: Modify the program

From the procedure above, the procedure prints the sum at each loop. Unless it is really necessary, or it is needed to test  the program, it is not a good practice.

To optimize the program, simply remove the line at displays the sum (i.e. line 10) and place it at the end of the loop.

So, the end of the procedure looks like:

Line 10: i <-- i 2

Line 11: }

Line 12: DISPLAY ( sum )

Line 13:

Other Questions
THIS SI THE ANSWER TO UR QUESTION 11111 Question 9 (5 points)(05.05 LC)A bus company charges a fixed amount plus a fee based on the distance traveled. The cost chart for the company is shown:Cost ChartDistance traveled (miles) (x) Cost (dollars) (y)0419214What is the fixed amount charged? (5 points)$4O$5$10512 Why should fitness equipment be purchased new? Dakota earned $15.75 in interest in Account A and $28.00 in Account B after 21 months. If the simple interest rate is 3.0 for Account A 4.0% for Account B, which account had the greater principal? Explain State weather ABC and AED are congruent. Justify your answer What effect did Emperor Ashoka have on Buddhism? An ice cream company fills containers with 64 ounces of ice cream. The acceptable percentage of error in filling eachice cream container is 1.5%.Select all the expressions that could be used to find the greatest number of ounces of ice cream each container canhold.64(1.15)64(1.015)64(1.5)+6464-64(1.5)64(0.015)-6464+64(0.015) It takes Diego of an hour to complete a lap on a circular bike track. The track is mile long. What is Diego's bike speed? 8 hours per mile 1/8 mile per hour 8 miles per hour 1/8 hours per milePLEASE HELP, I DON'T UNDERSTAND THE WORDING Write a summary, explaining how the writers convey their different viewpoints of the fires they each describe. I need answers please? whats -5( a -6)+2a ? Write a letter to King George Ill explaining who you believe the colonies in NorthAmerica should be allowed to peacefully separate from Britain. Use theprompting questions above. Assume Bank XYZ has 3 assets and 4 liabilities, with the following information: Assets Liabilities yield dollar value cost dollar value 5% 1,000 0% 3,000 10% 4,000 2% 1,000 20% 2,000 4% 1,000 6% 1,000 We also know the noninterest income is 1,000, the noninterest expense 1,200, the provision for loan losses 50, the realized securities gains and losses 40, and the tax 20. What is the net income of Bank XYZ What are the pros and cons of being ofn OFW in relation to social stratification and inequality Look at the equation below. What units are used for W? Give the full name, not the symbol.Enter your answerW = m x g a. How are pieces 1 and 2 related? pieces 3 and explain howthe pieces are related 673. :1) x: 5,8 = 365;3) x: 8,1 = 0,15;2) x : 8,4 = 2,3;4) x: 0,22 = 4,9. How did Jonas feel as he watched his Father inject the smaller twin? How are the number of representatives determined per state?2 Per stateBased on PopulationThe President ChoosesBased on land area I am having trouble on figuring out how to write this out to solve it. Which of the expressions below is greater than 100? Select all that apply.A) 41.588 + 48.112B) 25.768 + 77.312C) 93.546 + 7.015D) 297.354 195.81E) 112.457 11.982