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Hierarchical Model

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The hierarchical Model is introduced in the Information Management System(IMS) Devloped by IBM in 1968.

This hierarchical Model is like as a tree structure, used to construct a hierarchical record in the form of set of nodes and edges. The Relationship beetwen among data have parent-child.

This hierarchical model database is widely used in the first main frame database management system.

There are many advantages and disadvantages of hierarchical model database.

Advantages

1: Ease to maintain and updates.

2: High speed of access to large database

3: Simplicity

4: Data Security

Disadvantages

1: Implementation Complexity: A hierarchical model database is simple but complex to implement.

2: Database management problems

3: Lack of structural independence

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