That this language designed for non-programmers is what programmers are forced to use when they want to use relations is the biggest single reason for the mess that software development is today.
If developers had access to a variety of Datalog databases (noting that Datalog was first described 3 years after SQL was), not only the heavyweight client-server things that SQL assumes, but if developers could freely use Datalog to represent more of their code in first order logic, then software today would be very different and much better.