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- Key-value: in a key-value NoSQL database, all of the data within consists of an indexed key and a value. Cassandra, DynamoDB
- Column-based: designed for storing data tables as sections of columns of data rather than as rows of data. HBase, SAP HANA
- Document Database: map a key to some document that contains structured information. The key is used to retrieve the document. MongoDB, CouchDB
- Graph Database: designed for data whose relations are well-represented as a graph and has elements which are interconnected, with an undetermined number of relations between them. Polyglot Neo4J
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