Business Analyst: What is a data model?

Data model — conceptual representation of data structures.

Levels:

• Conceptual — high-level entities.
• Logical — attributes and relationships.
• Physical — database implementation.

Components:

• Entities (tables).
• Attributes (columns).
• Relationships (connections).
• Keys (primary, foreign).

Example:

Benefits:

• Visualizes data.
• Supports design.
• Communicates structure.