VTL-ML - Join operators

The Join operators are fundamental VTL operators. They are part of the core of the language and allow to obtain the behaviour of the majority of the other non-core operators, plus many additional behaviours that cannot be obtained through the other operators.

The Join operators are four, namely the inner_join, the left_join, the full_join and the cross_join. Because their syntax is similar, they are described together.

• Join: inner_join, left_join, full_join, cross_join