Denormalization is the process of joining previously normalized tables back together.

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Denormalization involves combining normalized tables back into a less-normalized structure. This is often done to improve query performance or simplify data access, and can involve the creation of redundant data, the use of computationally expensive operations like aggregation or join, and the sacrifice of some level of data consistency in favor of improved performance.

Denormalization Is the Process of Joining Previously Normalized Tables Back