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    ѧÉú±í  S 
          SID  SNAME
  ½Ìʦ¿Î±í T 
          TID  TNAME  TCL
  ³É¼¨±í  SC   
            SID  TCL  SCR
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create table SC(
SID varchar(64) ,
TCL varchar(64) ,
SCR int) ;
create table S (
SID varchar(64) ,
SNAME varchar(64)
) ;
create table T
(
  TID varchar(64),
  TNAME varchar(64),
  TCL varchar(64)
) ;
insert into S VALUES ('1','11') ;
insert into S VALUES ('2','22') ;
insert into S VALUES ('3','33') ;
insert into S VALUES ('4','44') ;
insert into SC VALUES ('1','a',100) ;
insert into SC VALUES ('1','b',90) ;
insert into SC VALUES ('2','a',77) ;
insert into SC VALUES ('3','b',34) ;
insert into SC VALUES ('4','a',59) ;
insert into SC VALUES ('4','b',88) ;
insert into T VALUES ('5','li','a');
µÚÒ»¸öÎÊÌâµÄ´ð°¸
select
  s.sname,sc1.scr,sc2.scr
from
  s,sc sc1,sc sc2 
where s.sid=sc1.sid
    and s.sid=sc2.sid
    and sc1.tcl='a'
    and sc2.tcl='b'
    and sc1.scr>sc2.scr
   
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   11 £¬100 £¬ 90
   
  µÚ¶þÌâµÄ´ð°¸
 
  select sid from
(select s.sid,a.tcl from (select sc.sid,sc.tcl  from sc,t where sc.tcl=t.tcl and t.tname='li' ) a
right join s
  on a.sid=s.sid ) b
where  b.tcl is null
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 create PROCEDURE pagelist
@tablename nvarchar(50),
@fieldname nvarchar(50)='*',         
@pagesize int output,--ÿҳÏÔʾ¼Ç¼ÌõÊý
@currentpage int output,--µÚ¼¸Ò³
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USE master
GO
CREATE DATABASE testbase2
ON
PRIMARY
(NAME = prim_sub_dat1,
FILENAME = 'G:\SQL SERVER2000\prim_sub_dat.mdf',
SIZE = 5MB,
MAXSIZE = 50MB,
FILEGROWTH = 20%),
(NAME = prim_sub_dat2,
FILENAME = 'G:\SQL SERVER2000\prim_sub_dat.ndf'
SIZE = 5MB,
MAXSIZE = 50MB,
......

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/* Variable Declaration */
DECLARE @EmpID AS SMALLINT
DECLARE @SQLQuery AS NVARCHAR(500)
/* Build and Execute a Transact-SQL String with a single parameter value Using EXECUTE Command */
SET @EmpID = 1001
SET @SQLQuery = 'SELECT * from tblEmployees WHERE EmployeeID = ' + CAST(@EmpID A ......

SQL ÁÙʱ±íÓëÁÙʱ±äÁ¿±í

 
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