What is data redadancy?

Data redundancy refers to the unnecessary duplication of data within a database or data storage system. This can occur when the same piece of information is stored in multiple locations, leading to inefficiencies, increased storage costs, and potential inconsistencies. While some level of redundancy can be useful for backup and recovery purposes, excessive redundancy can complicate data management and hinder performance. Effective database design aims to minimize redundancy while ensuring data integrity and accessibility.