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Author Question: The identifier of the entity becomes the ________ of the corresponding table. A) primary key B) ... (Read 78 times)

joesmith1212

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on: Jul 7, 2018
The identifier of the entity becomes the ________ of the corresponding table.
 
  A) primary key
  B) foreign key
  C) supertype
  D) subtype
  E) either A or B

Question 2

Which of the following is not true about primary keys?
 
  A) Primary keys cannot be null.
  B) Primary keys must be unique.
  C) Primary keys must be a single attribute.
  D) Primary keys are used to represent relationships.
  E) Primary keys can be defined using an SQL CONSTRAINT phrase.


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hanadaa

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

A

Answer to Question 2

C


joesmith1212

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Reply 2 on: Jul 7, 2018
Excellent

covalentbond

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Reply 3 on: Yesterday
:D TYSM

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