Agree about not implicitly finding the join key. But as long as we're brainstorming imaginary features, then maybe as part of the schema, we could somehow decla

Agree about not implicitly finding the join key. But as long as we're brainstorming imaginary features, then maybe as part of the schema, we could somehow declare the default join key to use, for any given two tables. In most cases it's pretty obvious what the best join key would be.