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Data inconsistency definition
Explain what is meant by data inconsistency within a database.
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Marking points
- 1 States that the same data is stored in multiple places.
- 2 States that the stored copies are not identical.
Full-mark answer
Data inconsistency occurs when the same item of data is stored in more than one place but the copies do not have identical values, for example when one copy is updated and another is not.
Why this answer loses marks
The same data is stored more than once.
That describes redundancy only; inconsistency also requires the stored copies to have different values.