RQL stands for Rules Query Language. It's a great declarative language that allows you to retrieve functional dependencies and other advanced rules on databases.
You can try RQL with a sample database, which is already filled with data. Once registered, you also have access to a personal database, in which you can add and manipulate your own data!
Please register to setup your database and start using RQL.
Log in to start using RQL right now!
Documentation is available to learn more about RQL and how to use it.