Assigning usergroup based on CB field values - Using CB Auto Action Query

I'm afraid I can't use the usergroup type of CB Auto Action.

For many reasons I have to use a language tag and a user profile type for 3rd party applications, CB GJ and Blogs.
Access to CB GJ groups will be managed by the group's access type of its category assignment.

There are actually 6 languages and 6 profiles provided summing up to 36 varities of Joomla User Groups (like "it-IT4" for italian and profile 4).
Or ... when using the usergroup CB Auto Action feature = 36 Auto Actions.

I'ld rather opt-in for a SQL statement directly writing the usergroup/access definition with an Query CB Auto Action -- like:

update TABLE_HERE set COLUMN_NAME_HERE = concat('[cb_language_tag]','[cb_profile_selector]');

But what is the correct table and column? And ... is this methode reliable?

Thanks.

Seams like it'd be easier to simply create 36 auto actions and handle the the cb_language_tag and cb_profile_selector check in the conditions. If you still want to do this directly in SQL then review the _user_usergroup_map database table carefully as it's responsible for holding usergroup assignments for users. You will likely need to do a subquery or join of _usergroups if you don't have the usergroup id and are trying to find it from usergroup title.