A type of database that organizes data into some data structure other than the two-dimensional tables seen in relational databases. Also called non-relational databases, NoSQL databases can be document-based (like MongoDB), column-based (like Apache Cassandra), graph-based (like Neo4j), or key-value (like DynamoDB). Other flavors of NoSQL databases do exist, including hybrids, but these are the most commonly-used.
|Database Type||Use Cases||Cloud Examples||Self-hosted Examples|
|Key-Value||ECommerce, recommendation engines, high-traffic||DynamoDB, CosmosDB, BigTable||Redis|
|Column||Business intelligence, data warehousing||Keyspaces, CosmosDB||Apache Cassandra|
|Graph||Recommendation engines, fraud detection, social networks||Neptune||Neo4j|
|Document||Content management systems, user profiles, product information||DocumentDB, CosmosDB, Firestore||MongoDB|