query: SELECT count(*) ,  role_code FROM users GROUP BY role_code
question: What-all are the different role codes for users, and how many users have each?
query_toks: SELECT count ( * ) , role_code FROM users GROUP BY role_code
query_toks_no_value: select count ( * ) , role_code from users group by role_code
question_toks: What-all are the different role codes for users, and how many users have each?