Comment by teleforce

Definitely they should include D4M and GraphQL [1],[2].

Not only D4M can cater for structured relational data, it's also suitable for non-structured and sparse data in spreadsheet, matrices and graph. It's essentially a generalization of SQL but for all things data.

There's also integration of D4M with SciDB [3].

[1] D4M: Dynamic Distributed Dimensional Data Model:

https://d4m.mit.edu/

[2] GraphQL:

https://graphql.org/

[3] D4M: Bringing associative arrays to database engines:

https://arxiv.org/abs/1508.07371