Tim,
You can export your data as html and paste it into a tiddler and see what happens. Once it is in there it may be possible to interrogate the contents of that tiddler to extract the data you want.
If the output is a HTML table there are tools on the internet to extract data from a html table, such as convert it to csv or excel. If csv there is a way to import csv into tiddlywiki and convert the rows to tiddlers.
A simple text export may also be able to be edited to make it look like a data tiddler which you can then list the rows and perhaps bulk create tiddlers.
Could you share a sample of the html export or other formats from your database?
Regards
Tony