Do you mean something like knowledge based form?
User input their information and the system reply with a solution?

There is a possibility in your question but as above post stated the question is misleading?/not clear. wp can almost possibly do anything.

consider whether you need a database at all, if you just want to create a form that displays different information depending on what the user submits, just put the data in the code that processes the form.
I would say you don't need a database unless you want to be able to save the user information or their selections in some way, in which case it becomes a question of security too, do the users need to login with a password etc.
if it is not sensitive information, for temporary storage you could have a PHP file write their selected info to a small text file based on their IP.
but again it is a question of whether you need to actually store something or just using return data based on their selection.