What types of databases are supported in PostgreSQL?

PostgreSQL is an object-relational database management system that supports multiple data types and storage models:

• Relational tables — the primary data storage model in the form of rows and columns.
• JSON and JSONB — for storing and processing semi-structured data in JSON format.
• Arrays — support for arrays of various data types.
• Geometric types — points, lines, polygons, etc.
• XML — for storing XML documents.
• Hstore — key-value store for unstructured data.
• Full-text search — special types and indexes for text search.

Thus, PostgreSQL supports not only classic relational data but also extended types for working with documents, geospatial data, and key-value pairs.