Interpret the principle of NEO4J database from technical dimension

The Neo4J database is a high -performance database for storing, retrieving and management map structures.It uses the graph database model to store data as a collection of nodes and relationships to make the relationship between data clearer and efficient. In terms of technical dimensions, the implementation principle of the NEO4J database includes the following main aspects: 1. Figure database model: NEO4J uses nodes -based data models.Nodes represent entities or objects, while relationships represent connection or interaction between nodes.Both nodes and relationships can include attributes to save related data.By organizing data in the form of figures, Neo4J can better represent the complex relationship between entities. 2. Storage engine: NEO4J uses a storage engine called "attribute diagram storage".It stores the data data in a sparse matrix, and each matrix entry contains the attribute values of the corresponding nodes and relationships.In this way, Neo4J can efficiently store and access large -scale diagram data. 3. Index technology: In the database, the identifier (ID) of nodes and relationships is used to uniquely identify them.NEO4J uses B+trees and other index technology to accelerate the search and access operation of data through the ID of nodes and relationships.Indexs make it possible to quickly locate specific nodes or relationships in large map databases. 4. Query Language: In order to better support the query operation of the database, Neo4J introduced a query language called "Cypher".Cypher is a type of SQL statement query language that allows users to query the diagram database in an intuitive and flexible way.Through CyPher, you can quickly write query statements and get the required data. In addition to the above basic principles, using the NEO4J database also needs to understand the relevant programming code and configuration.Neo4J provides drivers for various mainstream programming languages, such as Java, Python, and JavaScript.You can connect the NEO4J database and perform query and operation by introducing the corresponding driver. In terms of installation and configuration, you need to download and install Neo4J software packages suitable for your operating system.Once the installation is complete, you can configure the database settings by modifying the configuration file of the NEO4J, such as the listening port, memory allocation and safety settings. For advanced functions and customized needs, you can also expand the database function by writing plug -ins or using existing NEO4J extensions.There are many community development plug -in and extensions in the NEO4J ecosystem to choose from, such as graphic visualization tools, algorithm library and data import tools. In summary, the NEO4J database is based on the diagram database model, which uses the attribute diagram to store the engine, and provides efficient data storage and query capabilities with index technology and CyPher query language.By understanding the programming code and related configuration of NEO4J, you can better use this powerful database to build and manage complex graph structure data.