Which anomaly occurs when a record is updated in the relation?
Correct answer: C. Update anomaly
- A. Good data
- B. Data integrity
- C. Update anomaly
- D. Normalization
Explanation
Update anomaly refers to a situation in a database where modifying a record can lead to data inconsistency or redundancy. This happens when the same data is duplicated across multiple tables, and updating one instance of the data might not be reflected in all the other locations. In conclusion, update anomaly is a specific type of anomaly that occurs when updating data in a poorly designed database schema, leading to inconsistencies. Normalization helps prevent update anomalies by ensuring data is stored efficiently and avoids unnecessary duplication
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