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Ideally, an entity identifier is composed of _____ attribute(s)?

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Problem:

Can anyone help it was actually asked in exam as following and I need to know whether my answer was right or not?


Ideally, an entity identifier is composed of _____ attribute(s)?
A) one
B) two
C) three
D) six

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1 Answer

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Solution:

Based on your above question an entity identifier is composed of one attribute(s)
Details:
Ideally, an entity identifier is only composed of only a single attribute. However, it is possible to have a composite identifier, which is a primary key that is composed of more than one attribute. Composite and Simple Attributes: Attributes are classified as simple or composite
 
This will help you.
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