What is data redundancy?

< 1 min read

Data redundancy is the unnecessary duplication of the same data in multiple places.
It can lead to storage inefficiency and inconsistent information.
In one project, customer details were stored in both CRM and sales tables.
We introduced a central dimension table to remove duplicates.
This ensured updates in one place reflected everywhere.
As a BA, I identify redundancy during data modeling or ETL design.
Reducing redundancy improves data accuracy and system performance.
It simplifies maintenance and reporting.

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