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Author Question: Which of the following is not true about subtype entities? A) Subtypes may be exclusive. B) The ... (Read 106 times)

jho37

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on: Jul 7, 2018
Which of the following is not true about subtype entities?
 
  A) Subtypes may be exclusive.
  B) The supertype and subtypes will have the same identifier.
  C) Subtypes are used to avoid a situation in which some attributes are required to be null.
  D) All subtypes of a supertype must have the same attributes.

Question 2

In a correlated subquery of a database that has tables TableOne and TableTwo, if table TableOne is used in the upper SELECT statement, then which table is used in the lower SELECT statement?
 
  A) TableOne
  B) TableTwo
  C) Both TableOne and TableTwo
  D) Either TableOne or TableTwo


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tanna.moeller

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

D

Answer to Question 2

A


jho37

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Reply 2 on: Jul 7, 2018
Gracias!

covalentbond

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Reply 3 on: Yesterday
Wow, this really help

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