If you want to learn about Azure DocumentDB, Microsoft's NOSQL solution in the Cloud, go take a look at the DocumentDB Query Playground.
It gives you an interactive environment to try the rich querying functionality that Azure DocumentDB offers over schema-free JSON data.
I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.