A set of database design rules that minimizes data redundancy and results in a database in which the Database Engine and application software can easily enforce integrity.

• 一组数据库设计规则,它将数据冗余降至最低,并得到这样一个数据库:数据库引擎和应用程序软件可以在此数据库中轻松地强制实现完整性。