Shulou(Shulou.com)06/02 Report--

Xiaobian to share with you what types of data models in the database, I believe most people still do not know how, so share this article for your reference, I hope you have a lot of gains after reading this article, let's go to understand it together!

The nature of a database is determined by the "data model" it uses. Data model is a tool used to abstract the real world in database design, and is a formal framework used to provide information representation and operation means in database; data model is the core and foundation of database system.

The nature of a database is determined by the "data model" it uses.

Data Model is the abstraction of data characteristics, which describes the static characteristics, dynamic behaviors and constraints of the system from the abstract level, and provides an abstract framework for the information representation and operation of database systems. Data model describes three parts: data structure, data operation and data constraint.

The content described by the data model includes three parts: data structure, data operation and data constraint

Data structure: The data structure in the data model mainly describes the type, content, nature and relationship between data. Data structure is the foundation of data model, and data operations and constraints are built on data structure. Different data structures have different operations and constraints.

Data operations: Data operations in the data model mainly describe the operation types and operation modes on the corresponding data structures.

Data constraints: The data constraints in the data model mainly describe the syntax, semantic relationships, constraints and dependencies between the data in the data structure, as well as the rules of data dynamic changes to ensure the correctness, validity and compatibility of the data.

Type of data model:

There are three basic data models in the process of data development, they are hierarchical model, network model and relational model.

1. Hierarchical model

Organize data into a one-to-many relationship structure, representing entities and their relationships in a tree structure.

2. Network model

Using link commands or pointers to determine the network connection relationship between data is a many-to-many type of data organization.

3. Relationship model

Organizing data in the form of record group or data table is a very effective data organization method to establish the relationship between spatial data and attribute data, so as to store and transform the relationship between various entities and attributes.

The above is "What are the types of data models in the database?" All the contents of this article, thank you for reading! I believe that everyone has a certain understanding, hope to share the content to help everyone, if you still want to learn more knowledge, welcome to pay attention to the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.