SELECT SUM(`sum_credits_used`) as sum, rpc_accounting_v2.rpc_key_id, rpc_key.user_id, user.email FROM `rpc_accounting_v2` JOIN rpc_key ON rpc_accounting_v2.rpc_key_id=rpc_key.id JOIN user on rpc_key.user_id=user.id GROUP BY `rpc_key_id` ORDER BY sum DESC LIMIT 100