Database management System Database system

Database: The warehouse where the data is stored.

Database management System: A collection of software that is used to manage databases between users and the operating system.

Database system: A system consisting of a database and its management software. Generally have a database, database management system, development tools and a variety of user components.

Database model: 1 Hierarchical Model (tree structure) 2 mesh model (graph structure) 3 relationship model (general two-dimensional relational table)

Three elements of a data model: Structural operational integrity constraints

Three schema structures for the database: Inner mode outside mode conceptual mode (between inside and outside modes)

Database management System Database system