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Author Question: When representing a 1:1 relationship in a relational database design, ________. A) the key of ... (Read 37 times)

plus1

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on: Jul 7, 2018
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


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gasdhashg

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Reply #1 on: Jul 7, 2018
Answer to Question 1

B

Answer to Question 2

C


plus1

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Reply 2 on: Jul 7, 2018
Wow, this really help

samiel-sayed

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Reply 3 on: Yesterday
Excellent

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