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Learn about five essential database types and discover how to select the right one for your specific needs in this 31-minute conference talk from EuroPython 2025. Explore the fundamental differences between database types based on how they handle data structure, including relational databases like PostgreSQL and SQLite, columnar databases such as ClickHouse, document databases like OpenSearch, key-value stores including Valkey, and graph databases exemplified by Neo4J. Gain practical insights into when and why to choose each database type depending on your data characteristics and intended use cases. Understand the core principles behind how each database type operates and examine open source examples that demonstrate their capabilities. Access accompanying slides and resources to reinforce your understanding of database selection criteria and implementation considerations for modern data storage solutions.
