Explain Data Model and Relational Model.

1. This logical structure of the database is known as a Model. 

2. The data model defines how the data is connected to each other and how they are processed and stored inside the system.

3. The data model describes the method of storing and retrieving the data.

4. The relational data model is the primary data model, which is used widely around the world for data storage and processing. 

5. The relational data model is simple and has all the properties and capabilities required to process data with storage efficiency.