Is this SQL databases or No-SQL?

If you say so :-)

I don't think that was the intention, but yes, it works.

As I see it, Pick was designed by engineers, Relational by mathematicians. And you may well have noticed that I praise relational theory, but damn relational databases. Because the database imposes requirements (C&D's 1st rule, primarily) that were done simply to make the problems solvable. And cripple the DBMS in the process.

Pick being far more flexible, can take advantage of all the advances in theory, without being tied down by the maths.

If you do play with Pick, though, BE CAREFUL! It's the C of the database world - it gives you plenty of rope and will happily let you hang yourself with it. Do an EAR analysis, and then as I said declare each object type as a FILE (or "table") and store the object view in it. But Pick will happily let you split it across several files should there be sound engineering reasons ... :-)

Cheers,
Wol