Definition:
A data model is a description of the organization of data in a database. It also describes the relationship among data and any constraints that have to be defined on the data.
Data models can be broadly be classified into two categories:
A data model is a description of the organization of data in a database. It also describes the relationship among data and any constraints that have to be defined on the data.
Data models can be broadly be classified into two categories:
- Object-based logical model
It focuses on describing the data, the relationship among the data, and any constraints defined.
- Record-base logical model
It focuses on describing the data structure and the access techniques in a Database Management System.
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