Well, SQL and NoSQL get thrown around a lot but generally people mean 'standard relational' vs. 'newer, potentially schemaless' DB.

By a 'SQL/NoSQL' view, Cassandra has CQL which isn't ANSI standard but close enough to be a SQL.

It’s a distributed near–real‐time querying system for data at rest that supports subset of SQL.

Google has scalable SQL database called Spanner[1]. They also have a proper NoSQL database called internally Megastore[2] that provides distributed transactions based on entity‐groups on top of BigTable. Also known as High Replication Datastore and available via AppEngine[3].

[1] https://en.wikipedia.org/wiki/Spanner_%28database%29

[2] https://www.cidrdb.org/cidr2011/Papers/CIDR11_Paper32.pdf‎

[3] And hopefully via Google Compute pending announcement in few days at I/O. That is if Google actually wants their Cloud to succeed.