So, I really don’t know, and I don’t know anything about your database structure specifically. But my first impression is that this would be reversed.
You’d likely need to do something manually before importing. For example, writing a processing script that would parse your database information and write it out as Markdown files with properties, tags, comments, folder structure, etc.
I don’t know if there exists any general toolset for custom imports from a database. There are specific importers from common note tools.
If you can find a way to parse and export your database info as Markdown files, Obsidian will happily read and use them. The notes are stored plainly as text and folders.