database - Is Redundant Data Necesary For Deletion Anomalies?

Question

My database textbook states that "a data anomaly (update, insertion, deletion) develops when not all of the required changes in the redundant data are made successfully."

This does not make sense to me though, as I can easily make an example where a file is vulnerable to a deletion anomaly but does not contain redundant data.

Customer_Name	C_Address	Salesman_Name	Salesman_PhoneNumber
Customer1	Some Address	Some Salesman	Some Phone Number

question from:https://stackoverflow.com/questions/65928459/is-redundant-data-necesary-for-deletion-anomalies

Answer 1

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