You should now understand that data models are very important in the construction of a real database. Most DBMS are constructed in a structural fashion. These models can be categorized into different types, based on their structures. Different models apply to different stages of the database design process. In this section, we will explore some of the most common types of data model that are used in real business scenarios.
Types of data model
Hierarchical database models
A hierarchical model uses a tree-like structure to represent the data, with a single parent, or a root, in each record. The record corresponds to a single table, holding information about a particular subject, and is connected to other records using links...