The original Carlo Strozzi "NoSQL" database did exactly what you said. It was an RDBMS. It supported joins. It just didn't use SQL syntax; it used a stream-o

The original Carlo Strozzi "NoSQL" database did exactly what you said. It was an RDBMS. It supported joins. It just didn't use SQL syntax; it used a stream-operator paradigm. Instead of "OUTER JOIN" you used "jointable -al" https://en.wikipedia.org/wiki/Strozzi_NoSQL https://en.wikipedia.org/wiki/Strozzi_NoSQL