If a hierarchical model contains N:M relationship types that have been integrated by repeating the child nodes
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If a hierarchical model contains N:M relationship types that have been integrated by repeating the child nodes where necessary, what are the dangers of updating the database?
a. Slower retrieval of data.
b. Creating data inconsistency.
c. Creating unnecessary records.
d. All of the above.
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Related Book For
Principles Of Database Management The Practical Guide To Storing Managing And Analyzing Big And Small Data
ISBN: 9781107186125
1st Edition
Authors: Wilfried Lemahieu, Seppe Vanden Broucke, Bart Baesens
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