What are the advantages of the impeller as a preferred model?
The access path of the relational model is transparent to the user, thus having higher data independence, better security and confidentiality, and simplifying the work of the programmer and the work of database creation and development.
The data structure is simple and clear, the user is easy to understand and easy to use. It not only describes entities with the relation, but also describes the relation between entities by using the relation. Moreover, the operation result of the data is also related.
Relational models are different from non relational models, and they have strict mathematical theories.
