Adding redundant data to one or more tables is a database optimization technique called denormalization. This can assist us in avoiding relational database joins that are expensive. Be aware that denormalization does not equate to “not normalizing” or “reversing normalization.” It is an optimization method used subsequent to normalization.
Denormalization is intentionally introducing redundancy in a database to improve query performance. It involves combining tables or adding redundant data to reduce the need for complex joins, optimizing data retrieval speed. This trade-off sacrifices some storage efficiency for faster query operations, making it suitable for scenarios with frequent read operations.