(Firstly, apologies for not having a demo. I realise for a tool like this, it's best to give some sort of demo, rather than putting up a landing page. Having said that, demo is coming - soon. But I want to gauge some interest, get some feedback on the concept, do some initial, early validation etc.)
DropQuery is a tool I'm working on at the moment, which you can use to upload your CSV file and use standard SQL to query it.
Would love to have you as an early user to get some feedback on the upcoming release! - so please sign up if you'd be interested!
http://dropquery.com