select T_User.ID,T_User.name,T_User.sex,T_User.age,T_User.phonenumber,T_User.role,T_Department.name from (T_User natural join T_Belong) left join on T_Department on T_Belong.d_id = T_Department.ID
select T_User.ID,T_User.name,T_User.sex,T_User.age,T_User.phonenumber,T_USER.PASSWORD,T_User.role,T_Department.name as department from (T_User left join T_Belong on T_User.ID = T_Belong.U_ID)
left join T_Department on T_Belong.d_id = T_Department.ID
from ((((((T_Request natural join T_Require) left join T_Drugs on T_Require.d_id = T_Drugs.ID)
select T_Request.ID,T_Drugs.ID as drug_ID,T_Drugs.name as drug_name,T_Norms.feather,T_Request.num,T_User.name as user_name,T_Department.name as department_name,T_Request.REQ_DATE
from (((((((T_Request left join T_Require on T_Request.ID = T_Require.R_ID) left join T_Drugs on T_Require.d_id = T_Drugs.ID)
left join T_Type on T_Drugs.ID = T_Type.d_id)
left join T_Norms on T_Type.n_id = T_Norms.ID)
left join T_Commit on T_Request.ID = T_Commit.r_id)
left join T_User on T_User.ID = T_Commit.u_id)
left join T_Belong on T_Belong.u_id = T_User.ID)
left join T_Department on T_Department.ID = T_Belong.d_id