Database levels Modeling
There are three levels of data modeling: conceptual data model, logical data model, and physical data model.
| Feature | Conceptual | Logical | Physical |
| Entity Names | ? | ? | |
| Entity Relationships | ? | ? | |
| Attributes / Column | ? | ||
| Primary Keys | ? | ? | |
| Foreign Keys | ? | ? | |
| Table Names | ? | ||
| Column Names | ? | ||
| Column Data Types | ? |
Conceptual Data Model
'Conceptual schema' is a high-level design of business information. It typically includes only the main concepts and the main relationships among them.
Logical Data Model
Contains logical information, data, and groups.
Physical Data Model
Contains everything required to create databases and tables, such as column names and data types.
https://www.guru99.com/data-modelling-conceptual-logical.html
