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create table e191_sporter( sno char    (5) primary key,
           sname varchar (20) not null,
  sex char    (2)  ,
  dname varchar (20) not null)
go
create table e191_project( pno char(5) primary key ,
  pname varchar(20) ,
  address varchar (20) )
go
create table e191_grade ( sno char(5),
 pno char(5),
 credit tinyint null ,
 check(credit in(6,4,2,0)),
 primary key (sno,pno),
 foreign key(sno) references e191_sporter(sno),
 foreign key(pno) references e191_project(pno))
go
insert into e191_sporter values('1001','ÀîÃ÷','ÄÐ','¼ÆËã»úϵ') ;
insert into e191_sporter values('1002','ÕÅÈý','ÄÐ','Êýѧϵ') ;
insert into e191_sporter values('1003','ÀîËÄ','ÄÐ','ÎïÀíϵ') ;
insert into e191_sporter values('1004','Íõ¶þ','ÄÐ','ÎïÀíϵ') ;
insert into e191_sporter values('1005','ÀîÄÈ','Å®','Êýѧϵ') ;
insert into e191_sporter values('1006','ËïÙ³','Å®','Êýѧϵ') ;
insert into e191_project values('x001','ÄÐ×ÓÎåǧÃ×','Ò»²Ù³¡') ;
insert into e191_project values('x002','ÄÐ×Ó±êǹ','Ò»²Ù³¡') ;
insert into e191_project values('x003','ÄÐ×ÓÌøÔ¶','¶þ²Ù³¡') ;
insert into e191_project values('x004','Å®
    
     
	
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