Recently viewed a demo on the new Dynamic Objects in InterSystems (we are still running 2016.1); together with the upcoming IRIS data platform I started thinking about possibilities of building dynamic databases. That is, I can imagine some projects were it might be really nice to store dynamic objects and then run sql queries on them without ever defining the fields of the dynamic objects (i.e. not at storage, but only if you run your sql query). If there is any system where this might be possible it is InterSystems Cache. Of course, Ithis might not be a good idea for an entirety of reasons,
SQL is a standard language for storing, manipulating and retrieving data in relational databases.