- A strategy used on previously-normalized databases to increase performance. It is a process of trying to improve the read performance of a database, at the expense of losing some write performance, by adding redundant copies of data or by grouping data. Denormalization is often motivated by performance or scalability in relational database software needing to carry out large numbers of read operations. It differs from the unnormalized form in that denormalization benefits can only be fully realized on a data model that is otherwise normalized. ← Wikipedia
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