What he really wants: A Better Notepad (Score 1)

Sounds to me like a better notepad might help as regular notepad is slow to load and use with large files. Also, learning SQL seems out of the question as it can a bit advanced for a hobby project. Perhaps the features of Notepad++ (free) or TextPad (free to try) can help as they open large files quickly and still work fast (Google for them). Note, the amount of system memory limits the file size that the notepads can work with. Perhaps learn to use the Vi text editor or Vim which can open and work with very large files and are not limited to system memory. Albiet, the user interface of Vi or Vim can feel frustrating to a new user.