DATABASE FUNDAMENTALS
WHAT IS DATABASE MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hierarchical Models
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Network Models
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Segments
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Relational Model
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Detailed explanation-1: -An enhanced form of the hierarchical data model, the network model represents data in a tree of records. Relationships between tables (records) are expressed as sets. A set has one parent record (owner) and one or more child records (members).
Detailed explanation-2: -It is a database-specific model representing relational data objects (columns, tables, primary and foreign keys), as well as their relationships. Also, physical data models can generate DDL (or data definition language) statements, which are then sent to the database server.
Detailed explanation-3: -The network model is the extension of the hierarchical structure because it allows many-to-many relationships to be managed in a tree-like structure that allows multiple parents. Records contain fields which need hierarchical organization.
Detailed explanation-4: -Network Model-A data model created to represent complex data relationships more effectively than the hierarchical model could, to improve database performance, and to impose a database standard.