Cassandra implemented Cassandra query language (CQL), a simple subset of SQL, but this was designed primarily to provide an abstraction layer for developers, rather than a query language for end users ...

Microsoft's next version of SQL Server is available in public preview form for both Linux and Windows. Microsoft also is introducing SQL Server 2016 SP1.

But Microsoft execs did say earlier this year that SQL Server on Linux -- a subset of SQL Server 2016 on Windows -- will work on multiple Linux distributions, including Red Hat Enterprise Linux.

The ease and ubiquity of SQL have even led the creators of many “ NoSQL ” or non-relational data stores, such as Hadoop, to adopt subsets of SQL or come up with their own SQL-like query languages.

CloudSQL is not the only database-like system for the cloud; Microsoft has SQL Server Data Services to provide web service-based access to a limited subset of SQL Server functionality, and Amazon ...