In this blog post we are going to discuss about Overriding Identity Fields. For students new to the database world, it helps to begin thinking about ID fields in the context of larger organizations with lots of activity. A customer service department has a constant flow of activity and many representatives are entering data in the system simultaneously. The same is true for large billing departments. These are examples where an identity field helps to ensure the entities you care about get tracked properly. A CustomerID value that is automatically generated with each new record makes sure each new customer gets a unique number – even if you have many reps all entering data at the same time.