DATABASE FUNDAMENTALS
WHAT IS DATABASE MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hierarchy
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Class
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Inheritance
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Class hierarchy
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Detailed explanation-1: -A hierarchical database model is a data model in which the data are organized into a tree-like structure. The data are stored as records which are connected to one another through links.
Detailed explanation-2: -Hierarchical Database: In hierarchical database model, data is organized in a tree structure that links a number of different elements to one parent record. Each record type has only one parent. Top element of tree is called parent while its branches are called children.
Detailed explanation-3: -Types of database models Hierarchical database model. Relational model. Network model. Object-oriented database model.
Detailed explanation-4: -The Disadvantages of the Hierarchical Model It does not support more than one parent of the child Node. If there is a complex relationship, where a child Node requires two parent nodes, it cannot be represented with this model.