- [[Postgres]] - [[MySQL]] - [[SQLite]] - [[Oracle Database]] - [[SQL]] ### General --- - stores data in table and rows - can perform join operations using [[SQL]] across different database tables - has rigid schema compared to [[NoSQL Databases]] - you query data using [[SQL]] - typically scales by [[Vertical Scaling]] - is [[ACID]] compliant ### When to Choose SQL --- - we want [[ACID]] compliance - financial applications - we need structured, consistent data