It may be worth having a look at Raia (https://raia.live)

I'm actively developing this product.

One of the things I added is something called "Assistant Profiles". Given the fact that you know the DB structure, you can create a custom Assistant Profile and adjust it to fit the underlying DB better, which improves the results quite a lot

You can then expand the connection to other external systems and automate a lot of the analysis processes your users may have

I'm happy to work with you to make it work for your use case