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Author Question: Which of the following is true about representing a weak entity with the relational model? A) If ... (Read 59 times)

pane00

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Which of the following is true about representing a weak entity with the relational model?
 
  A) If the weak entity is existence-dependent, the key of the parent must be part of the key of the weak entity.
  B) If the strong entity has a minimum cardinality of 1, the key of the weak entity must be part of the strong entity.
  C) If the weak entity is ID-dependent, the key of the weak entity must be part of the key of the parent entity.
  D) If the weak entity is ID-dependent, the key of the parent entity must be part of the key of the weak entity.
  E) If the parent entity is existence-dependent, then the minimum cardinality of the weak entity is zero.

Question 2

Which SQL keyword is used to specify a condition that rows must meet to be included in the results of an SQL SELECT query?
 
  A) SELECT
  B) FROM
  C) WHERE
  D) ORDER BY
  E) GROUP BY



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Anna

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Answer to Question 1

D

Answer to Question 2

C




pane00

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Reply 2 on: Jul 7, 2018
Great answer, keep it coming :)


mammy1697

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Reply 3 on: Yesterday
Gracias!

 

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