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 99 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
Wow, this really help


ktidd

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Medication errors are three times higher among children and infants than with adults.

For a complete list of videos, visit our video library