create table T_Drugs(
    ID          varchar(5),
    name        varchar(20),
    num         numeric(3,0),
    unit_price  numeric(5,2),
    
    primary key (ID));
    
create table T_Norms(
    ID      varchar(5),
    feather varchar(10),
    
    primary key (ID));
    
create table T_Vendor(
    ID          varchar(5),
    name        varchar(20),
    address     varchar(64),
    phonenumber varchar(11),
    monitor     varchar(5),
    zipcode     varchar(6),
    
    primary key (ID));
    
create table T_Request(
    ID          varchar(5),
    num         numeric(4,0),
    req_date    date,
    
    primary key (ID));

create table T_User(
    ID          varchar(5),
    name        varchar(10),
    sex         char(1),
    age         numeric(2,0),
    phonenumber varchar(11),
    account     varchar(20) not null,
    password    varchar(20) not null,
    role        varchar(10) not null,
    
    primary key (ID));

create table T_Department(
    ID      varchar(5),
    name    varchar(10),
    member  numeric(3,0),
    floor   varchar(2),
    
    primary key (ID));
    
create table T_Type(
    d_id    varchar(5),
    n_id    varchar(5),
    
    primary key (d_id),
    foreign key (d_id) references T_Drugs(ID),
    foreign key (n_id) references T_Norms(ID));
    
create table T_Produce(
    d_id    varchar(5),
    v_id    varchar(5),
    
    primary key (d_id,v_id),
    foreign key (d_id) references T_Drugs(ID),
    foreign key (v_id) references T_Vendor(ID));

create table T_Require(
    d_id    varchar(5),
    r_id    varchar(5),
    
    primary key (d_id,r_id),
    foreign key (d_id) references T_Drugs(ID),
    foreign key (r_id) references T_Request(ID));

create table T_Commit(
    r_id    varchar(5),
    u_id    varchar(5),
    
    primary key (r_id),
    foreign key (r_id) references T_Request(ID),
    foreign key (u_id) references T_User(ID));
    
create table T_Belong(
    u_id    varchar(5),
    d_id    varchar(5),
    
    primary key (u_id),
    foreign key (u_id) references T_User(ID),
    foreign key (d_id) references T_Department(ID));

create table T_Sum_Commit(
    r_id    varchar(5),
    d_id    varchar(5),
    
    primary key (r_id),
    foreign key (r_id) references T_Request(ID),
    foreign key (d_id) references T_Department(ID));