The three common database data models are: 1. Hierarchical model; 2. Network model; 3. Relational model. The database model describes the method of structuring and manipulating data in the database. The structural part of the model specifies how the data is described (such as trees, tables, etc.).
The three common database data models currently are: hierarchical model, network model, and relational model.
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Introduction to relevant knowledge points
The database model describes structuring and manipulating data in the database method, the structural part of the model specifies how the data is described (such as trees, tables, etc.). The manipulation part of the model specifies operations such as adding, deleting, displaying, maintaining, printing, searching, selecting, sorting, and updating data.
Classification of database models
1. Concept model
2. Hierarchical model
3.Network model
4. Relational model
5. Object-oriented model
The expression form of the model in the general sense can be divided into physical model, mathematical model, structural model and simulation model.
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