SELECT su.user_id,su.real_name,sr.role_name,sr.role_id FROM `sys_role` sr left join sys_user_role sur on sr.role_id=sur.role_id LEFT JOIN sys_user su on sur.user_id=su.user_id
where sr.role_id=#{roleId}
SELECT su.user_id,su.real_name FROM `sys_role` sr join sys_user_role sur on sr.role_id=sur.role_id JOIN sys_user su on sur.user_id=su.user_id