You cannot manage any relation database with this, it is a database itself. You can't query MySQL using the psql tool either. The advantage of Tutorial D is th

You cannot manage any relation database with this, it is a database itself. You can't query MySQL using the psql tool either. The advantage of Tutorial D is that it is closer to relational algebra than SQL is. Which means that it probably doesn't have any null or three-valued logic. https://en.wikipedia.org/wiki/D_(data_language_specification)#Tutorial_D https://en.wikipedia.org/wiki/D_(data_language_specification...