Data models are fundamental structures that define how data is organized, stored, accessed, and manipulated within a database system. They serve as a blueprint that represents the logical organization of data elements and the relationships between them.

In this section, we will explore:

• The purpose and importance of data models
• Core components of data models
• How data models influence database design and performance

Data models matter because they:

1. Provide a structured way to represent complex real-world information
2. Enable efficient data storage and retrieval
3. Enforce data integrity and consistency rules
4. Serve as a communication tool between stakeholders

Key Components of Data Models

• Entities: Represent real-world objects or concepts
• Attributes: Properties that describe entities
• Relationships: Connections between different entities
• Constraints: Rules that govern data integrity