This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Distinguish between the primary key and a candidate key. What will be an ideal ... (Read 31 times)

Collmarie

  • Hero Member
  • *****
  • Posts: 569
on: Jul 7, 2018
Distinguish between the primary key and a candidate key.
 
  What will be an ideal response?

Question 2

Database designs are created during the component design step.
 
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ashely1112

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 7, 2018
Answer to Question 1

Both the primary key and a candidate key can uniquely identify the rows in a table. The primary key is the candidate key that is chosen by the database designer, working with the users, to uniquely identify rows and to represent relationships. Although any candidate key could, by definition, be selected to act as the primary key, the choice of primary key is often based on design decisions such as the amount of foreign key data that would be generated.

Answer to Question 2

TRUE


Collmarie

  • Hero Member
  • *****
  • Posts: 569
Reply #2 on: Jul 7, 2018
Thank you :)


ashely1112

  • Sr. Member
  • ****
  • Posts: 347
Reply #3 on: Jul 7, 2018
Happy to help you


« previous next »
 

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Plant apical meristems and the primary tissues they produce. Plant apical meristems and the primary tissues they produce.
The pattern of primary succession at Glacier Bay, Alaska. The pattern of primary succession at Glacier Bay, Alaska.
The Primary Visual Pathway The Primary Visual Pathway
The primary pulse points of the body. The primary pulse points of the body.
Twelve primary energy channels and the Conception and Governing Vessels of Traditional Chinese ... Twelve primary energy channels and the Conception and Governing Vessels of Traditional Chinese ...
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ... Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
Video: Transferring genes into plants Animation

For a complete list of videos, visit our video library