Distributed SQL databases are relational databases that distribute data over multiple compute instances (each instance a node in a database cluster) and offer a SQL-compatible distributed query layer.
Distributed SQL databases are highly resilient, massively scalable, and can be geo-distributed across availability zones, regions, and often cloud providers.
Distributed SQL databases deliver strong consistency and ACID transactions with single-digit millisecond latency. These databases are increasingly powering a new generation of always-on, highly available, hyper-scalable applications and microservices.