I primarily use a declarative language called LogiQL, which is a superset of Datalog. It's basically logic programming. Using predicates and rules. We have a p

I primarily use a declarative language called LogiQL, which is a superset of Datalog. It's basically logic programming. Using predicates and rules. We have a proprietary database called LogicBlox, that allows us to push all business logic down to the database layer, and almost entirely avoid having a service layer, or at least a very lean one. This allows us to address efficiency problems purely by optimizing database joins between predicates (tables). Our data is highly normalized (6NF). http://www.logicblox.com/learn/ http://www.logicblox.com/learn/