updated: 2022-01-23_12:32:31-05:00

Data Models

• Collection of tools for describing:
  • data
  • relationships
  • semantics
  • constraints

Types:

• Relational Model
• Entity-Relationship (usually for database design)
  • way of seeing if relations are good or bad
  • models an enterprise as a collection of entities and relationships
  • represented diagrammatically by an entity-relationship diagram
• Normal Forms
  • formalize which are bad and test for it
• Object-based models (object oriented and object relational)
• Semistructured (XML)
• Old models
  • network
  • hierarchical