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create table student (sid varchar(10),sname varchar(10),sage varchar(10),ssex varchar(10))
create table Sc (sid varchar(10),cid varchar(10),score int)
insert into sc select '0001','001',80
insert into sc select '0001','001',90
insert into sc select '0001','002',70
insert into sc select '0001','003',85
insert into sc select '0002','001',50
insert into sc select '0003','001',60
insert into sc select '0003','002',70
insert into sc select '0004','001',60
insert into sc select '0004','002',70
insert into sc select '0004','003',80
insert into sc select '0004','004',90
insert into student select '0001','swichin','26','ÄÐ'
insert into student select '0002','lamh','27','ÄÐ'
insert into student select '0003','ballack','34','ÄÐ'
insert into student select '0004','lucio','32','ÄÐ'


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SQL code:
--> Éú³É²âÊÔÊý¾Ý±í: [tb]
IF OBJECT_ID('[student]') IS NOT


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