List the databases you know and rate them on a 10-point scale.

Here are the databases I have worked with, along with my rating on a 10-point scale in terms of experience and depth of knowledge:

• PostgreSQL — 9/10: experience with relational models, complex queries, indexes, transactions.
• MySQL — 8/10: well-versed in configuration, query optimization, replication.
• MongoDB — 7/10: used for document storage, understanding of aggregation functions and sharding.
• Redis — 7/10: used as a cache and message broker, familiar with data structures and usage patterns.
• Cassandra — 6/10: basic knowledge, used for scalable storage of large data.

These ratings reflect my practical experience and understanding of the features of each DBMS.