Creating posts with database information

Hello,

currently I am searching for a plugin with following feature:
Connecting tags or something like that within a post with content from a custom database table within the word press installation.
I tried to set up a blog with some information about a collection. Hence, many information are structured and I would like just to define one template and actual posts are automatically filled with those information from a database table – which might be entered on a small separate screen.

Is a plugin with those or similar features somewhere available?

Best regards,
Oliver