1. Common denomalization opportunities are: Performance data : 2. Circumstamces for creating denormalized records: The denormalized records must serve good purpose only when it improves the performance for an application or user group which needs to search regularly for some reference data. Solution 1. Common denomalization opportunities are: Performance data : 2. Circumstamces for creating denormalized records: The denormalized records must serve good purpose only when it improves the performance for an application or user group which needs to search regularly for some reference data..