What are data models?

The software application usually stores business information in files and databases. Data models are a logical representation of business processes in the organization. They define how the company interacts with people, places and things. The data model is used as a reference point to determine the rules of relationships between entities in the organization.

The data model creation process is divided into three primary phases. These are domain models, logical models and physical models. Each phase is completed in the progression of the ending physical model, which represents the real database structure.

Domain design is the first step in creating a data model. This is a view of business units at a high level within the organization and their relations to each other. Domain data models define a conceptual relationship between organizations and processes needed to complete a business function. An example of the model of the domain is the appointment between the product organization and the impact that the order for the transport department has.

Enterprise domain is aboutBeskler at a high level of view of the organization and does not require accurate details of each type of business requirement. However, it is important to include all the affected business units in the design of the domain model. This high -level design is essential for the project team to understand the details that are needed to complete business functions.

Logical data models are versions of data models that represent the real business requirements of the company. These models are designed on the basis of high -level domain models within the organization. The sound logical design is decisive for creating a physical database. This process must clearly define the data elements that are necessary to complete a specific request. Logical data models include how the data will be accessible and the relationship between entities within the business process.

a good example of a logical datoThe model could be customers modeling for a telephone company. Each customer has a specific name, telephone number, address and phone function. The logical data model would provide relations between these types of elements, including how the information would be reported and loaded.

The final layer of data models is a physical data model. This is the area of ​​data models used to create a real database. The physical data model is a blue printing database that defines how the data will be stored in the software application.