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Denormalization
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=== DBMS support === With this approach, database administrators can keep the logical design normalized, but allow the [[database management system]] (DBMS) to store additional redundant information on disk to optimize query response. In this case it is the DBMS software's responsibility to ensure that any redundant copies are kept consistent. This method is often implemented in [[SQL]] as indexed views ([[Microsoft SQL Server]]) or [[materialized view]]s ([[Oracle Database|Oracle]], [[PostgreSQL]]). A view may, among other factors, represent information in a format convenient for querying, and the index ensures that queries against the view are optimized physically.
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