What database table includes user role information?

I'd like to search for users that have, and do not have, specific roles assigned to their accounts via SQL. I can query user accounts via AGILEUSER table, but cannot identify how to incorporate ROLES into the SQL. I'm assuming this is an alternate table, which I've searched for but cannot find.  What table should I include/query?

Note: I am fully aware of the admin reports that include this information; I'd just rather query via SQL.

Thanks in advance for any help.

Regards,
Drew