SELECT * FROM `forum`.`phpbb_user_group` WHERE `group_id` = 'X';
Please note that X is group id you are targeting and forum is DB name. You can find the group ID by right clicking on it.This will list all users in the group you want for easier manipulation. Note that phpbb_ is standard prefix. Do not touch the DB if you don't know SQL basics.
"What would happen if the autism gene was eliminated from the genetic pool?
You would have a bunch of people standing around in a cave, chatting and socializing and not getting anything done."
- Dr. Temple Grandin, A Personal Look at Autism and Asperger's Syndrome.