A single player MUD?
You mean a text adventure?
Well, it might be simplar to use something like ADRIFT, or another high level creator. Allthough you lose a lot of controll.
If you really want to make it in DB, then you could create a database for the text lines on the screen.
Each new text for the player gets added to a new element at the bottom of the database.
You can then have the screen display only elements in a specfic range (done with a simple loop).
THe player could then use two keys (pageup/down) to scroll the range, and hence the text
This is needed if you want the player to have referance to much earlier text.
"The man who says it cannot be done is generally interrupted by someone doing it." ~ Elbert Hubbard