Record-Based Logical Model

Record-Based Logical Model

Now that you are familiar with the ER model, which is an example of an object- based logical model, we will look at
other data models. The three types of record- based logical models are:

Hierarchical model : 

In this model, data is represented in the form of a tree, and relationships between the data are represented by links.

Network model : 

In this model, the data and relationships among them are represented in the form of records and links. It is similar to a hierarchical model. However, records in a database are represented graphically.

Relational model :

 In this model, the table in a database has a fixed length record with fixed number of attributes or fields. Of these three models, the relational model is the most popular