A non-relational or NoSQL database is typically referred to as a NoSQL database. These databases are designed to handle large volumes of unstructured or semi-structured data and offer high scalability and flexibility. Common types of NoSQL databases include document stores, key-value stores, column stores, and graph databases. Unlike traditional relational databases, they do not use table-based data structures. Instead, they rely on various models for data storage and retrieval, allowing for more diverse data types and structures.