Data modelling is the process of creating a visual representation of a system’s data and the relationships between different data elements.
This helps in organizing and structuring the data so it can be efficiently managed and utilized.
Data modelling ensures that data is logically structured and organized, making it easier to store, retrieve, and manipulate in a database.
Workflow of Data Modeling:
Types of Modeling:
- Relational: Organizes data into tables.
- Object-Oriented: Focuses on objects and their state changes, e.g., robots in a car factory.
- Entity: Uses ER Diagrams to represent data entities and relationships.
- Network: An extension of hierarchical models.
- Hierarchical: Organizes data in a tree-like structure.