What are three signals that a surrogate key should be generated for the primary key of a relation instead of using the main key?

CMPTR
3rd Edition
ISBN:9781337681872
Author:PINARD
Publisher:PINARD
Chapter17: Creating A Database
Section: Chapter Questions
Problem 4QY
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What are three signals that a surrogate key should be generated for the primary key of a relation instead of using the main key?

 

 

 

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