Single Model Databases
Single model databases are database systems designed to store and manage data using a single, specific data model, such as relational, document, key-value, graph, or column-family. They optimize performance and functionality for that particular model, offering specialized query languages and storage structures tailored to its characteristics. This contrasts with multi-model databases, which support multiple data models within a single system.
Developers should use single model databases when their application's data structure aligns closely with a specific model, as this allows for high performance, simplicity, and deep optimization in handling that type of data. For example, use a relational database like PostgreSQL for transactional data with complex relationships, a document database like MongoDB for flexible, JSON-like data, or a graph database like Neo4j for highly interconnected data such as social networks. They are ideal when the use case is well-defined and doesn't require the flexibility of multiple models.