The power of the relational model is that we can use operators to combine relations to form new relations, which are then understood to also encode true proposi

The power of the relational model is that we can use operators to combine relations to form new relations, which are then understood to also encode true propositions. A relational join is a logical implication. This is how SQL is able to answer complex queries with certainty from elementary certain data. Bayesian networks are able to do similar things from uncertain data.