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create table stz
(
stuNO int primary key ,
subject nvarchar(20) not null,
score int not null
)
insert into stz values(1000 ,'Êýѧ',90)
insert into stz values(1001,'ÓïÎÄ',90)
insert into stz values(1002,'Ó¢Óï',90)
insert into stz values(1001 ,'Êýѧ',90)
insert into stz values(1002,'ÓïÎÄ',90)
insert into stz values(1000,'Ó¢Óï',90)
insert into stz values(1002 ,'Êýѧ',90)
insert into stz values(1000,'ÓïÎÄ',90)
insert into stz values(1001,'Ó¢Óï',90)
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select * from stz;
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use tempdb
go
if (object_id ('t1' ) is not null ) drop table t1
if (object_id ('t2' ) is not null ) drop table t2
go
create table t1 (a int )
insert into t1 select 1 union select 2 union select 3
create table t2 (a int )
insert into t2 select 3 union select 4 union select 5
go
sele ......