What Is a Data Model? Understanding Its Two Meanings

What exactly is a data model? The answer depends on how the term is being used. In this video, we explore the two common meanings of a data model: • The big-picture definition—the overall approach a database system uses to organize, connect, access, and manage data • The specific-design definition—the structures and relationships created to support a particular organization or business process We also briefly examine the development of database models, from early hierarchical and network models to relational, object-relational, extended relational, and NoSQL approaches. Finally, we look at how entity-relationship diagrams, or ERDs, visually represent entities, attributes, and relationships in a database design. Understanding these two meanings will help you better understand database technology and make more informed database-design decisions. #DataModels #DatabaseDesign #Databases #SQL #RelationalDatabase #NoSQL #ERD #ComputerScience