Elaborate the difference between hierarchical database, network database, relational database, and object-oriented database with diagrams.
Question
Elaborate the difference between hierarchical database, network database, relational database, and object-oriented database with diagrams.
Solution
Sure, let's discuss the differences between hierarchical database, network database, relational database, and object-oriented database.
- Hierarchical Database: In a hierarchical database, data is organized into a tree-like structure. It implies that, data is stored hierarchically (top-down or bottom-up) format. The data is represented using parent-child relationship. However, one parent can have multiple children but children have only one parent.
Diagram:
Parent
/ \
Child1 Child2
- Network Database: In a network database, data is organized more like a graph, and are allowed to have more than one parent node. This model allows each child to have multiple parents, which makes it a bit more complex to design and manage.
Diagram:
Parent1 Parent2
\ /
Child
- Relational Database: In a relational database, data is organized into one or more tables. Each table has a unique key field which is used to connect it to other tables. Hence, all the tables are related to each other in some way. This model is most commonly used in the industry because it is easy to use and understand.
Diagram:
Table1 <----> Table2
- Object-oriented Database: In an object-oriented database, data is organized around objects rather than actions, and around data rather than logic. For instance, a multimedia record in a relational database can be a definable data object, as opposed to an alphanumeric value.
Diagram:
Object1 <----> Object2
Each of these database models have their own use-cases and are used in different scenarios depending on the requirements.
Similar Questions
Which database model uses tables to store data?a. Hierarchicalb. Networkc. Relationald. Object-oriented
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A database can be best described asA Useful presentation of dataB Organized collection of dataC Graphical representation of dataD None of the above
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