This topic contains a solution. Click here to go to the answer

Author Question: When representing a 1:1 relationship in a relational database design, ________. A) the key of ... (Read 98 times)

plus1

  • Hero Member
  • *****
  • Posts: 676
When representing a 1:1 relationship in a relational database design, ________.
 
  A) the key of each table must be placed as foreign keys into the other
  B) the key of either table may be placed as a foreign key into the other
  C) the key of both tables must be the same
  D) the intersection table gets the key from both relations

Question 2

Which of the following is considered to be a weak entity?
 
  A) A subtype entity
  B) The archetype in an archetype/instance pattern
  C) The association entity in an association pattern
  D) The parent entity in a parent-child relationship



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

gasdhashg

  • Sr. Member
  • ****
  • Posts: 335
Answer to Question 1

B

Answer to Question 2

C




plus1

  • Member
  • Posts: 676
Reply 2 on: Jul 7, 2018
Great answer, keep it coming :)


daiying98

  • Member
  • Posts: 354
Reply 3 on: Yesterday
Gracias!

 

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

For a complete list of videos, visit our video library