Can you list the databases you have worked with and describe their features?

I have worked with several databases, each with its own features:

• PostgreSQL — a relational DBMS supporting complex queries, transactions, and extensibility. Well-suited for projects where data integrity and complex relationships are important.
• MySQL — a popular relational database often used for web applications. Known for high performance and easy configuration.
• MongoDB — a document-oriented NoSQL database that stores data in JSON-like documents. Convenient for flexible schemas and rapid prototyping.
• Redis — an in-memory key-value store used for caching and fast data operations.

Each of these databases is suitable for different tasks: relational for structured data with relationships, NoSQL for flexible and scalable solutions.