Can i do separated databases for many users of the website?

Can I create a database into which various text data will be dumped, sorted by cells in the table in accordance with the specified rules
And is it possible to somehow teach the database where and what to sort (what text need to be puted in what gaps)?
Each user will have their own database and will also have a common database

I think you’re talking about creating a portal. Check out these portal-building tools: