Query to Find what Content has what Visitor Groups on it

We are in need of removing current visitor groups from our content and switching them to a different visitor group.
The Visitor groups are mapped across multiple pieces of content as well as multiple sites.

I am trying to build a SQL query for EpiServerCMS DB to piece together what content has what Visitor group associated with it so that we can pinpoint the changes and make them.

Is there a different tool I could use to access this information/is there a pre-existing query to pull this information together?

Thank you.