There are a lot of tools on the market that try and fill this gap-- Socrata, Google Fusion Tables, and the forthcoming "Enigma.io"
All of them will take some form of commitment to learn how to understand and use. So why not spend that time learning and understand the tool that gives you the most flexibility to do with what you want. In that case, it's probably MySQL or Postgres, both of which are widespread (can run on any platform), tested (have been used for years), and flexible (are open source). Plus, unlike any of the web-based applications I've named, you don't have to worry about the vendor that creates the tool mothballing it. MySQL and Postgres are largely permanent pieces of infrastructure. Once installed on your machine, it'd be hard for Oracle to come and take your SQL away.
They're also easy to learn. I'd suggest grabbing the MySQL binaries for the platform of your choice, then a tool like Sequel Pro for the Mac, that can help you create a table and import your favorite CSV file. Then take some basic tutorials. This one is a good place to start.
Your ROI is likely going to be higher in learning the basics how to grab data and insert it into MySQL or Postgres than it is mastering the others.