What databases have you worked with?

In my practice, I have worked with various databases:

• Relational DBMS:

  • PostgreSQL — for complex analytical queries and transactional systems.
  • MySQL — for high-load web applications.
  • Oracle — in large corporate projects requiring high reliability.
  • Microsoft SQL Server — in projects on the .NET platform.

• NoSQL databases:

  • MongoDB — for document storage and flexible data schemas.
  • Redis — as an in-memory store for caching and fast data processing.

• Others:

  • Apache Cassandra — for distributed systems with high availability.

I have worked with JDBC, Hibernate, JPA for interacting with these databases, optimized queries, designed data schemas, and ensured data integrity.