Computer Science for IGCSE & O level - Databases (Section 2 - No. 44)
What is data redundancy, and why is it undesirable in a database?
Data redundancy is the same data stored in multiple places, leading to inconsistencies and increased storage requirements.
Data redundancy means all data is stored in one place.
Data redundancy improves data integrity.
Data redundancy means that the database is running faster.
Wyjaśnienie
Data redundancy is the repetition of data in different parts of a database, which increases the risk of inconsistencies and wastes storage space.