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Data Model

Data Models

Introduction

A data model is a conceptual representation of the structure and relationships of data in a database.

Types of Data Models

  • Conceptual Data Model: High-level representation of data entities and relationships.
  • Logical Data Model: Detailed representation of data entities, attributes, and relationships.
  • Physical Data Model: Representation of data storage and access mechanisms.

Components

  • Entities: Objects or concepts that are represented in the data model.
  • Attributes: Characteristics or properties of entities.
  • Relationships: Connections between entities.

Benefits

  • Improved Data Understanding: Data models help stakeholders understand data requirements and relationships.
  • Better Data Design: Data models guide the design of databases and data warehouses.
  • Data Consistency: Data models ensure data consistency and integrity.

Common Data Modeling Notations

  • Entity-Relationship Diagrams (ERDs): Visual representation of entities, attributes, and relationships.
  • Unified Modeling Language (UML): Standard language for software modeling, including data models.
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