What are the commonly used data models?

Common data models of database management system;

1, hierarchical model

Organize data into a one-to-many relational structure, and the hierarchical structure accesses all parts of each level with keywords;

2. Grid model

It is a many-to-many data organization mode to determine the explicit connection relationship between data with connection instructions or pointers.

3. Relationship model

Organizing data in the form of record groups or data tables is a very effective data organization method to establish the relationship between spatial data and attribute data, so as to use the relationship between various geographical entities and attributes for storage and transformation.