What databases have you worked with?

As a systems analyst, you often need to interact with various databases, including:

• Relational databases: PostgreSQL, MySQL, Oracle, Microsoft SQL Server — for structured data and complex queries.
• NoSQL databases: MongoDB, Cassandra, Redis — for flexible schemas, document storage, caching.
• Columnar databases: ClickHouse, Apache Cassandra — for analytical tasks with large volumes of data.

Experience includes analyzing requirements, designing data structures, optimizing queries, and collaborating with development and database administration teams.