By the way, if someone had the same problem I had, here is the trick.
The tables are wp_term_taxonomy and wp_term_relationships.
We can JOIN them ON wp_term_taxonomy.term_taxonomy_id = wp_term_relationships.term_taxonomy_id
Also,
wp_term_relationships.object_id is the user ID number.
term_taxonomy_id is the Group/Type number
wp_term_taxonomy.description is the Group/Type description
I hope it helps others ?? !!!