Hierarchical model (Record based data model) | Data models

HIERARCHICAL MODEL(RECORD BASED DATA MODEL)

INTRODUCTION-

It is developed to manage large amounts of data for complex manufacturing projects.

                             (STRUCTURE OF HIERARCHICAL MODEL)

This structure contains levels or segments.The top layer is known as the parent of the segment .Root segment is the parent of level 1 segment.This model defects a set of one to many relationship between parent and children segments.E.G COLLEGE STRUCTURE

ADVANTAGES OF HIERARCHICAL MODEL:-

1.) It provides simplicity and it is easy to design.

2.) It also provide data integrity.Since, it is based on parent-child relationship.So, there is always a link between these segments.

DRAWBACKS OF HIERARCHICAL MODEL:-

1.) There exist operational anomalies in this model.

2.) Implementation Complexity

3.) It is easy to design but very difficult to implement.

4.) Database Management System-If you make any change in the database structure then you need to make all the necessary changes in all the application program that access the database.