I'm looking for a basic version of Oracle that I can install on Windows 2003 for a single user to develop against. The application will be a .NET 2003 web application. Can anyone please advise me on the best/cheapest option?
As long as it is used for development / study purposes, you can download Oracle for free. Install whichever you want; I, for example, use Oracle 8.1.7 database (I think that Oracle is going to stop providing support for it in a short time from now, but - if your needs are such that you won't need additional support, you can use it. If not, use 9i or 10g) and Oracle 10g Development Suite.