I think Datalog should be thought of as "in the logic programming family", so other data languages based on logic programming are likely to be similar. And, of

I think Datalog should be thought of as "in the logic programming family", so other data languages based on logic programming are likely to be similar. And, of course the relational model of data is based on first-order logic, so one could say that SQL is a declarative logic programming language for data.