USE SCHOOL
insert Stu_Union values ( '10001','李勇','0',24,'EE')
select * from Stu_Union;
create table Course (
  cno char(4) NOT NULL UNIQUE,
  cname varchar(50) NOT NULL,
  cpoints int,
  constraint PK primary key (cno));  
insert Course values ('0001','ComputerNetworks',2);
insert Course values ('0002','Databsae',3);