Can you list the main types of database management systems you know?

Main types of database management systems (DBMS):

• Relational DBMS (RDBMS) — store data in tables with clearly defined relationships. Examples: MySQL, PostgreSQL, Oracle.
• Document-oriented DBMS — store data in document formats (e.g., JSON). Example: MongoDB.
• Key-Value (Key-Value) DBMS — simple key-value pair storage structure. Example: Redis.
• Column-oriented DBMS — optimized for storing and processing large volumes of data by columns. Example: Apache Cassandra.
• Graph DBMS — store data as graphs (nodes and edges). Example: Neo4j.

Each type is suitable for different tasks depending on data structure and performance requirements.