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it seems that databases can be divided into relational dBs also called SQL databases and NoSQL databases. My question is where do in-memory-databases fit into this picture? I only find in-memory-databases use the main memory as data storage instead of the disk storage. Can both relational and NoSQL Databases use this in-memory-technology ?

Thank you !

Red King
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SQL/NoSQL refers to the DB type while in-memory relates to where the data is physically stored. The two are orthogonal (unrelated), meaning, any DB regardless if it's SQL/NoSQL can be ran both in-memory or on disk.

Nir Alfasi
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