What is 3 db?

1. MySQL: MySQL is an open-source relational database management system that uses Structured Query Language (SQL) for managing and organizing data. It provides features like multiple storage engines, transactions, triggers, and views, which make it flexible and scalable. MySQL is commonly used for web development applications due to its reliability, speed, and ease-of-use.

2. MongoDB: MongoDB is a document-oriented database that stores data in a format similar to JSON (JavaScript Object Notation). It is ideal for applications requiring high scalability and availability as it can quickly handle unstructured data such as social media posts, sensor data, and log files. MongoDB is designed to operate on large clusters of servers, making it a popular choice for big data analytics.

3. Oracle: Oracle Database is a relational database management system that uses SQL as its primary query language. It is an enterprise-grade database with features like automatic data backup, high availability, and enhanced security. Oracle is primarily used in large organizations, government agencies, and financial institutions which require reliable, scalable, and secure data storage and processing. Additionally, Oracle also provides cloud-based database services called Autonomous Database that enable users to create, manage, and scale databases in the cloud without worrying about the infrastructure.