Derived information is information that is derived or calculated from other information in the database. In relational terms, this redundant information makes the table it is in de-normalized. For example, a bank balance is information that can be derived. Instead of adding up all the deposits and withdrawals from the time the account was opened, a bank can maintain a balance in the account record and manipulate the balance every time a transaction occurs on the account. Although derived data can be an efficient way to manage computing resources in a non-replicated environment, you must be aware of the risks of using derived information in a replicated environment.