Kenneth Fisher has a simple database trigger to track certain data definition language events:
A couple of notes before testing the code. The event groups I’m using will pull CREATE, ALTER and DELETE events for those objects. For a more complete list of events (you might want to add service broker events for example) go here. Also I’m using ORIGINAL_LOGIN because it will return who made the change even if they are impersonating someone else.
For my test, I created a user that only has db_DDLADMIN on the database. That means it can make DDL changes but can’t insert, update, delete or even run a select against any table in the database. That’s why I grant INSERT to public for the logging table.
It’s a good way of knowing when unexpected changes happen, too.