I database just learn a small white, looking for a lot of books, baidu has been looking for, there almost no associate these two things make people understand, or doesn't mesh together, is really pain,

Database design is divided into three levels: the view layer, logic layer and physical layer,

And data model has three types: conceptual model and logical model, physical model,

And data pattern has three types: the model, model (or conceptual model, logic model), the pattern,

These what link? Model and the model how to understand the concept, and books and said some kind of data model of need specific data model?? I tried to data model corresponding to each of the data mode, but also said that outside the model is part of the design, pattern is the overall design, what's the relationship between the model and the model??

What a great god can extensively on, it is better for example,

CodePudding user response:

I understand it, the data model is more reflect the business (mainly defines the data), the data model reflects the implementation (mainly show the data extraction combination