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What are the advantages and disadvantages of a hierarchical data model and network data model?
Hierarchical data model :
Advantages
- simplicity
- data security
- data integrity
- efficiency
- ease to add and delete record
Disadvantages
- implement complexity
- database management problem
- lack of structural independence
- programming complexity
- implementation limitation
- procedural access language
Network data model :
Advantages
- easy to access data
- can handle more relationship types
- data independence
- data integrity
- data independence
Disadvantages
- system complexity
- lack of structural independence
- procedural access language
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Difference between hierarchical and Network data module?
The hierarchical data model organizes data in a tree-like structure with a single parent for each child record. On the other hand, the network data model allows for multiple parent-child relationships, creating a more flexible and complex network of interconnected records. In the hierarchical model, relationships are one-to-many, while in the network model, relationships can be many-to-many.
What are the three benefits of hierarchical network model?
Reduced content for bandwidth Increased fault tolerance of the network Simplification of management and troubleshooting
What are the advantages and disadvantages of network data model?
Network data model is just like a normal database model. In network model the data is seen as related to each other by links. Or we can say the relation between the data is represented by links.
Disadvantages of Hierarchical database model?
Some disadvantages of the hierarchical database model include complexity in representing certain types of relationships, limited flexibility in querying data due to its rigid structure, and potential data redundancy issues as each child can only have one parent record.
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How is data organized in hierarchical data model?
The hierarchical model is a restricted type of network model. Again, data is represented as collections of records and relationships are represented by sets. However, the hierarchical model allows a node to have only one parent. A hierarchical model can be represented as a tree graph, with records appearing as nodes (also called segments) and sets as edges.
What are the benefits of a hierarchical data model and network data model?
In network model of database , all data is related to each other through a link. By a link we mean that it is an association between precisely two records/data . In hierarchical model records are organized as trees rather than arbitrary graphs.
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