SQLFiddle 2.0: Execution Plans, Better UI, client-side SQLite via sql.js
sqlfiddle.com
sqlfiddle.com
Another, similar tool is jsFiddle (http://jsfiddle.net/).
Anyone know of any others like this?
2nd, it was a bit confusing at first not having to 'create' a database and instead jumping right into commands. Maybe add this note somewhere for clarification? It was just a bit of a dummy moment when the very first thing that happens is you run a create command, and then are looking at an error message.