Describe in your own words the two main data integrity constraints that we learnt in our discussion of databases. Provide your own examples of their use.

Answers

Answer 1

Answer:

Domain integrity constraint and Entity integrity constraint

Explanation:

Data integrity constraints protect the quality of data by ensuring data doesn't lose its integrity, validity, or consistency when there is update to data. Data integrity constraints are rules applied to table columns in DBMS systems to prevent any unintentional damage to data. There are four types of data integrity constraints: domain integrity constraint, entity integrity constraint, referential integrity constraint, and key constraint.

Domain integrity constraint applies rules to protect against the values or attributes in the table column.

Entity integrity constraint applies rules to protect the uniqueness of rows in the table.


Related Questions

of
tion
TCP/IP was developed in the 1960s to enable university scientists to locate other computers on the Internet.
Select one:
O True
O False

Answers

Answer:

True

Explanation:

What does it NOT mean for something to be open source?
It’s available for anyone to use
It’s free for all
It’s available for anyone to modify
Free to use but you have to pay a fee to modify

Answers

Answer:

Free to use but you have to pay a fee to modify

Explanation:

You NEVER have to pay for OPEN SOURCE

List the types of infrared we have

Answers

Answer: infared types like the sun, sun light, heat lamps, and radiators

What developments in chemical photography occurred in the nineteenth
century?

Answers

was coined in 1839 by Sir John Herschel, who was an important contributor to the development of the discipline himself. Thomas Wedgwood tried capturing pictures on pieces of leather, calling them “sun images” – however, they faded rapidly and could not be saved permanently. However, his actions were a passage to the first successful attempt to capture an image that would not fade away - one by Nicéphore Niépce in 1826, after 10 long years of working with camera obscura and photosensitive materials. when Niépce died and Daguerre continued the practice on his own. He then began exploring the silver-based processes again, until he finally discovered that pictures could be developed to full visibility using mercury fumes, with less exposure time too, directly onto the silver plates that were fumed with iodine vapor to produce silver iodide. The image was then stabilized or “fixed” using hot solution of common salt, which removed the remaining silver iodide. It was the year 1888 when Eastman’s very first hand-held Kodak camera containing the film went on the market and became available to practically everyone.

How far should you sit from your computer screen?
PLS ANSWEER ASAP

6 to 12 inches

12 to 18 inches

18 to 24 inches

24 to 30 inches

Answers

im sorry but none of these THE REAL ANSWER IS 16 to 30 inches
Yes the answer is 16 to 30 inches
Non of these are the answer

After correcting an issue, what screen should be checked to ensure there are no more problems before restarting the machine?

Answers

After correcting an issue, the screen should be checked to ensure there are no more problems before restarting the machine is the  Repair or Fix Windows option.

What will Windows repair do?

The term Windows repair is known to be a tool that is often repair or fix issues or some certain problems, such as a missing or damaged system files and others.

It is one that is often used if there is something that is preventing Windows from starting correctly. One need to Restores a computer's system files to an earlier point in time to do this.

Hence, After correcting an issue, the screen should be checked to ensure there are no more problems before restarting the machine is the  Repair or Fix Windows option.

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What variation pairs a new employee with an employee who has been with the company for 20 years?

Answers

The variation pairs a new employee with an old employee usually focus on employee accomplishments, and criteria that employee meets or not.

What are the Appraisal Methods used to evaluate an employee's performance?

The behavioral method is known to be one of the ways to check an employee's actions within a given job.

Conclusively, There is also the use of Comparative methods that tends to compare one employee with different employees. The use of Results methods are the ones that looks into  employee accomplishments.

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Answer:

expert-novice

Explanation:

You have an Azure subscription that contains the following fully peered virtual networks: VNet1, located in the West US region. 5 virtual machines are connected to VNet1. VNet2, located in the West US region. 7 virtual machines are connected to VNet2. VNet3, located in the East US region, 10 virtual machines are connected to VNet3. VNet4, located in the East US region, 4 virtual machines are connected to VNet4. You plan to protect all of the connected virtual machines by using Azure Bastion. What is the minimum number of Azure Bastion hosts that you must deploy? Select only one answer. 1 2 3 4

Answers

Answer:

To protect all the connected virtual machines with Azure Bastion, the minimum number of Azure Bastion hosts that you must deploy is 2.

Explanation:

Azure Bastion provides secure and seamless RDP and SSH access to virtual machines directly through the Azure portal, eliminating the need to expose them to the public internet. Each Azure Bastion host provides connectivity to virtual machines within a single virtual network.

In this scenario, you have four virtual networks (VNet1, VNet2, VNet3, and VNet4) located in two different regions (West US and East US). Since VNet1 and VNet2 are in the same region (West US), you can deploy one Azure Bastion host in that region to provide access to the 12 virtual machines (5 in VNet1 and 7 in VNet2).

For VNet3 and VNet4, which are located in the East US region, you would need another Azure Bastion host to provide access to the 14 virtual machines (10 in VNet3 and 4 in VNet4).

Therefore, the minimum number of Azure Bastion hosts required is 2, with one host deployed in the West US region and another host deployed in the East US region.

Which part of the Result block should you evaluate to determine the needs met rating for that result

Answers

To know the "Needs Met" rating for a specific result in the Result block, you should evaluate the metadata section of that result.

What is the  Result block

The assessment of the metadata section is necessary to determine the rating of "Needs Met" for a particular outcome listed in the Result block.

The metadata includes a field called needs_met, which evaluates the level of satisfaction with the result in terms of meeting the user's requirements. The needs_met category usually has a score between zero and ten, with ten implying that the outcome entirely fulfills the user's demands.

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A researcher is interested in learning more about the different kinds of plants growing in different areas of the state she lives in. The researcher creates an app that allows residents of the town to photograph plants in their area using a smartphone and record date, time, and location of the photograph. Afterwards the researcher will analyze the data to try to determine where different kinds of plants grow in the state.Which of the following does this situation best demonstrate?A. Open dataB. Citizen scienceC. CrowdfundingD. Machine Learning

Answers

The answer is

B. Citizen Science

This is because Citizen Science is data collected by normal citizens that collect data as Amateur Scientists.

can you do the assignment I attach to this

can you do the assignment I attach to this

Answers

Answer:

If I could see it maybe the text is too small. try to take smaller photos

Explanation:

public static String[] strArrMethod(String[] arr) { String[] result = new String[arr.length]; for (int j = 0; j < arr.length; j++) { String sm = arr[j]; for (int k = j + 1; k < arr.length; k++) { if (arr[k].length() < sm.length()) { sm = arr[k]; // Line 12 } } result[j] = sm; } return result; }

Answers

Answer:

answer is 24

Explanation:

hope this helps

How is the query wizard used on a table?

Answers

The query wizard is a tool in database management systems that helps users create queries to retrieve specific data from a table. Here are the steps to use the query wizard on a table:

1. Open the database management system, such as Microsoft Access.
2. Open the table you want to query.
3. Locate the "Query Wizard" option, which is typically found in the toolbar or menu.
4. Click on the "Query Wizard" option to launch the wizard.
5. Follow the instructions provided by the query wizard.
6. Select the fields you want to include in your query from the available options.
7. Choose the criteria you want to use to filter the data. This can be based on specific values, ranges, or conditions.
8. Specify the sorting order for the query results, if desired.
9. Name the query and choose whether to immediately view the results or modify the design of the query further.
10. Click "Finish" or "OK" to generate the query and view the results.
By using the query wizard, you can easily create and customize queries without needing to write complex SQL statements manually. It provides a user-friendly interface to guide you through the process of querying a table.

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Click this link to view ONET's Tasks section for Web Developers. Note that common tasks are listed toward the top. and less common tasks are listed toward the bottom.

According to ONET, what common tasks are performed by
Web Developers? Check all that apply.


A. writing, designing, or editing web page content

B. using the web to purchase products for an employer

C. designing, building, or maintaining websites

D. setting up equipment for other employees

E. performing or directing website updates

Answers

According to ONET's Duties, the typical jobs carried out by web developers include creating or managing website updates as well as authoring, designing, or editing the content of web pages.

What regular tasks are carried out by web developers?

Develop and test programmes, user interfaces, and website menus. Create the website's code using coding languages like HTML or XML. Identify the information the website will contain by working with other team members. To decide on the layout of the website, consult with graphic and other designers.

What are the most popular services for web development?

The most popular web development service is probably full-stack development. Full-stack engineers, as opposed to highly specialised experts, have the skills and background to create both the front end and the back end.

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Answer:

writing, designing, or editing web page content

designing, building, or maintaining websites

performing or directing website updates

You are creating a game in which players lose their silver if they are robbed by pirates. Which line of code would remove the silver from the list of treasures? O A. treasures.pop("silver") O B. treasures.remove("silver") OC. treasures.pop["silver"] O D. treasures.remove["silver"]​

Answers

The  line of code that would remove the silver from the list of treasures is treasures.remove("silver").

What is needed to create a game?

In the development of a game, it's vital to know what is needed in the creation of that  game. Especially in the area of inputs such as coding.

Conclusively, The  line of code that would remove the silver from the list of treasures is treasures.remove("silver"). as it contains the information on the silver removal.

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Write a program binary.cpp that reads a positive integer and prints all of its binary digits.

Answers

Answer:

View image below.

Explanation:

They're just asking you to create a num2bin function on Cpp.

If you search for "num2bin in C", you can find a bunch of answers for this if you think my solution is too confusing.

One way to do it is the way I did it in the picture.

Just copy that function and use it in your program. The rest you can do yourself.

Write a program binary.cpp that reads a positive integer and prints all of its binary digits.

types of function in python programming language​

Answers

Answer:

there is  help()  min()  and input() they are the base for python language!
there are some harder ones like User-Defined Functions (UDFs) and set()

Which of the following was one reason why electronic (computer-based) information sharing was challenging in the not too distant past?
a. Individuals and/or members of organizations did not speak the same language.
b. Hardware and software applications on either end could not talk to one another.
c. The most powerful computers were owned by large companies.
d. Organizations needed to protect information for competitive advantage.

Answers

Answer:

B. Hardware and software applications on either end could not talk to one another.

Explanation:

The answer to this question is that making connection to the internet used to be very slow, it's operation was difficult and so was its maintenance. Therefore they could be said to be unreliable at the time making electronic information sharing difficult as well as challenging. From this explanation the right answer to this question is answer option b.

Thank you.

Why is sequencing important?

A. It allows the programmer to test the code.
B. It allows the user to understand the code.
C. It ensures the program works correctly.
D. It makes sure the code is easy to understand.

Answers

Answer:

c i think but if not go with d

Answer:

C

Explanation:

It ensures the program works correctly

hope it helps!

The code on the side is a software solution to the mutual exclusion problem for two processes. It shares two variables:

int turn;

Boolean blocked[2]

turn is initialized to 0 and blocked values are initialized to false. Find a counterexample that demonstrates that this solution is incorrect.

The code on the side is a software solution to the mutual exclusion problem for two processes. It shares

Answers

uh.................................

What is the correct command to shuffle the following list? import random people= ["Peter", "Paul", "Mary', 'Jane'] O shuffle (people) Opeople.shuffle() random.shuffle (people) random.shufflelist(people)​

Answers

Answer:

import random

people = ["Peter", "Paul", "Mary", "Jane"]

random.shuffle(people)

Explanation:

What is block chain?

Answers

Answer:

Block Chain is a system of recording information that makes it difficult or impossible to change, hack, or cheat the system.

A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain.

Hope this helps.

x

Blockchain is a distributed database existing on multiple computers at the same time. It is constantly growing as new sets of recordings, or ‘blocks’, are added to it. Each block contains a timestamp and a link to the previous block, so they actually form a chain. The database is not managed by any particular body; instead, everyone in the network gets a copy of the whole database. Old blocks are preserved forever and new blocks are added to the ledger irreversibly, making it impossible to manipulate by faking documents, transactions, and other information. All blocks are encrypted in a special way, so everyone can have access to all the information but only a user who owns a special cryptographic key is able to add a new record to a particular chain.

Can i get any information on this website i'd like to know what its for ?
https://www.torsearch.org/

Answers

Explanation: torsearch.org is a safe search engine mainly used for dark wed purposes. It does not track your location nor give any personal information.

Range is an example of a ______________.

Answers

Answer:

example in ( 4,6,9,3,7) lowest value is 3and highest is 9.

which statements describes the size of an atom

Answers

answer:

A statement that I always think about to understand the size of an atom. If you squish a person down to the size of an atom. It will make a black hole. and if you squish the whole Earth. down to the size of a jelly bean it will also make a black hole. This is just a approximation.

-----------------------

I use the scale to understand how small that is I am open to hear more principles if you were talking about math wise that would be glad to help.

if you have anymore questions I will try to answer your questions to what I know.

.

What's wrong with my program? Here is my code , if the user wants a 3rd card dealt they, have to select yes and the total will be for 3 cards. If they don't, then the total is for 2 cards.? I also need to print the total for both the dealer and the user and determine the winner of the game?


# import random
import random
def main():
# greet the user
print("Hello! Welcome to my card game!")
# deal the user a random card between 1 and 10
num1 = random.randint(1,10)
print("You drew a", num1)
# deal the user another random card (between 1 and two)
num2 = random.randint(1,10)
print("You drew a", num2)
num3 = random.randint(1,10)

# deal the user a third card?
again = input("Would you like to draw a 3rd card? Y or N? ")
d_total = random.randint(10,21)
u_total = (num1) + (num2) + (num3)
u_total1 = (num1) + (num2)
if again == "Y" or "y":

print("You drew a", num3)


if (u_total > d_total) and (u_total < 21):
# the user wins
print("Congratulations! You won!")
print("You drew a",num1,",", "a",num2,"," "and a",num3, "for a total of",u_total)
if again == "N" or "n":
print("You drew a", num1,"and a",num2, "for a total of",u_total1)


if (u_total > d_total) and (u_total < 21):


print("The dealer's total is", d_total)




else:

print("Sorry! You lose.")

main()

Answers

Your issue is on line 19 in your if statement. In python, if you have more than one condition in an if statement, you have to explicitly mention it after the or.

Your if statement is

if again == "Y" or "y":

However, this will always return true because the second statement simply asks "y".

To correct this, simply change the if statement to:

if again == "Y" or again == "y":

This will correct your code.

Another thing to consider is to always convert a userinput (whenever possible) to one version, this can be accomplished in your code by converting "again" into one version by using the .lower function.

again = input("Would you like to draw a 3rd card? Y or N? ")

again = again.lower()

Hope this helps!

Trying to solve this problem with for and while loops. Help appreciated. Thanks.

mystery_int = 7 #You may modify the lines of code above, but don't move them! #When you Submit your code, we'll change these lines to #assign different values to the variables. #Use a loop to find the sum of all numbers between 0 and #mystery_int, including bounds (meaning that if #mystery_int = 7, you add 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7). # #However, there's a twist: mystery_int might be negative. #So, if mystery_int was -4, you would -4 + -3 + -2 + -1 + 0. # #There are a lot of different ways you can do this. Most of #them will involve using a conditional to decide whether to #add or subtract 1 from mystery_int. # #You may use either a for loop or a while loop to solve this, #although we recommend using a while loop.

Answers

Sure, I can help you with that. Here's a solution using a while loop:

The Program

mystery_int = 7

total = 0

if mystery_int >= 0:

   i = 0

   while i <= mystery_int:

       total += i

       i += 1

else:

   i = 0

   while i >= mystery_int:

       total += i

       i -= 1

print(total)

And here's a solution using a for loop:

mystery_int = 7

total = 0

if mystery_int >= 0:

   for i in range(mystery_int + 1):

       total += i

else:

   for i in range(mystery_int, 1):

       total += i

print(total)

Both solutions work by first checking if mystery_int is positive or negative. If it's positive, we use a loop to add up all the numbers from 0 to mystery_int. If it's negative, we use a loop to add up all the numbers from mystery_int to 0. In the for loop solution, we use the range function to generate the appropriate sequence of numbers to add up.

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What would graphics be classified as?

Answers

Answer:

raster and vector graphics

raster graphics is the answer

Do you think privacy policies are effective in social networking sites?

Answers

Answer:

When that information gets posted online, it is no longer private, and may end up falling into wrong hands. Even if you have put in place the highest possible security measures, some of your friends, colleagues and companies you interact with on social media, can end up leaking your personal information.

In my opinion, privacy policies are less effective in social networking sites  When that fact receives published online, it's far now not private, and can become falling into incorrect hands.

What is the privacy in networking sites?

Privacy and safety settings exist for a reason: Learn approximately and use the privateness and safety settings on social networks. They are there that will help you manipulate who sees what you put up and control your online revel in in a fine way.

Even when you have installed location the best viable safety measures, a number of your friends, colleagues and businesses you engage with on social media, can become leaking your private facts.

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How can you refer to additional information while giving a presentation? will help you emphasize key points on a specific slide. The Notes section is only to you in the Slide view and not in the main Slide Show view.

Answers

Explanation:

1. welcome your audience and introduce yourself.

2. capture their attention

3. identify your number one goal or topic of presentation.

4. give a quick shout out line of your presentation.

5.

candidates should identify at least three different types of information in any one presentation from text, drawing, images, tables, video ,audio .

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The growth rate of Escherichia coli, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles approximately every 15 min.(a)If the initial population is 10, determine the function Q(t) that expresses the growth of the number of cells of this bacterium as a function of time t (in minutes). Answer: Q(t)=10e^[ln(2)/15](b)How long would it take for a colony of 10 cells to increase to a population of 1 million? (Round your answer to the nearest whole number.) Answer:_____________ How many acute angles are in triangle ABC? Do you think there should be a museum dedicated to slavery? Why or why not? Joan performed a shadow puppet play for her younger brother by shining a flashlight on paper cutouts behind a curtain. What happens to the light from the flashlight? Making laws for society is an example ofA. maintaining orderB. providing public servicesC. supporting the economyD. protecting territory you will write an assembly language program for the Pico Processor. Here are the particulars: Locations 120, 121, and 122 hold three input values. Be sure to pick 3 numbers, entering them into these memory locations. |?"Locations 123, 124, and 125 are the locations for the three output values. Write a program that sorts the 3 input values, placing the larger value in location 123, the middle value in 124, and the smallest value in 125. The________includes a message source that encodes an idea into a message and transmits the message through some medium. Marketing messages exploit a variety of appeals and message structures. The message is transmitted using one of several different communications media and is finally delivered to a receiver, who decodes the message and may provide feedback to the source. Anything that interferes with the communication is called noise. help pls!!!!!!!!!!!! help me how to answer this please A neutron star results when a star in its final stages collapses due to gravitational pressure, forcing the electrons to combine with the protons in the nucleus and converting them into neutrons. (a) Assuming that a neutron star has a mass of 3.0010 30kg and a radius of 1.2010 3m, determine the density of a neutron star. 10 20kg/m 3(b) How much would 1.0 cm 3(the size of a sugar cube) of this material weigh at Earth's surface? 10 15N Responsibility goes hand in hand with: Group of answer choices Respect Loyalty Courage Accountability 4. a. You want to plan to provide for 4 year college expenses for two children. Assume that the first child will be college going in 16 years and the other in 12 years. College tuition is 30,000 per year and tuition inflation is around 4%. How much do you need to save every month if the rate of return on your investments is 7%? At what frequency will a 50-mH inductor have a reactance XL = 7000? 0 352 Hz O 777 Hz 0 1.25 kHz O 2.23 kHz O 14 kHz LAST ONEEE Maryse bought a jacket from the store for $90.95. Shepaid a 7% sales tax when she bought the jacket. How Much was the jacket before the sales tax? Which of the reactions below are spontaneous?(Select ALL that are correct)a. Succinate + FAD --> Fumarate + FADH2 G = 0 kJ/molb. 3-phosphoglycerate --> 2-phosphoglycerate G = 0.8 kJ/molc. DHAP --> glyceraldehyde-3-phosphate G = 2.5 kJ/mold. Phosphoenolpyruvate + ADP + H+ --> pyruvate + ATP G = -16.7 kJ/mol who was awarded the highest rank in the us armed forces? Why was the weight of the fire snake slightly less after it was lit on fire A section of DNA codes for the sequence of nitrogenous bases of mRNA to initiateprotein synthesis as shown.GATACGCT(DNA)What is the process involved in the coding?O replicationO transcriptionO transductionO translationCUAUGCGA(mRNA) Interest rates affect corporate profits and security prices. Based on your understanding of the relationship between interest rates and corporate profits and security prices,identify which of the following statements is true and which is false. Statements 1. Interest rates affect the level of economic activity, which in turn affects the profits earned by a business organization, all other considerations remaining constant. 2. Interest rates will affect the preference of investors to own stocks versus owning bonds. 3. A sharp decrease in interest rates will increase the price of bonds, which can significantly decrease the potential for capital gains and the yield earned by a bondholder. This should decrease the demand for bonds compared to the demand for stocks, all other considerations remaining constant. 4. An increase in market interest rates will increase the opportunity cost of investors' funds and increase the price of financial assets.