What database management systems have you experience with?

In my practice, I have worked with several database management systems (DBMS):

• SQLite — often used for local data storage in mobile applications and small projects.
• MySQL — used for server applications where a relational database with support for complex queries is needed.
• PostgreSQL — employed for projects requiring advanced features such as complex data types and transactions.

I also have experience working with NoSQL databases, such as MongoDB, for storing unstructured data. The choice of DBMS depends on the project requirements: data volume, access speed, need for scaling, etc.