select u.id as 'id',u.name as 'name',u.status as 'status',if(r.id is null,0,r.id) as 'role_id',r.name as 'role_name',d.id as 'dept_id',d.dept_name,u.submit_order
from work_user u LEFT JOIN (select role_id,user_id FROM work_user_role GROUP BY user_id) ur ON u.id = ur.user_id
from work_user u LEFT JOIN (select role_id,user_id FROM work_user_role) ur ON u.id = ur.user_id