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Select Sysobjects.Name As ±íÃû,
       Syscolumns.Name As ÁÐÃû,
       Systypes.Name As ÁÐÀàÐÍ,
       Syscolumns.Length As Á㤶È,
       Isnull(Sysproperties.Value, Syscolumns.Name) As ÁÐ˵Ã÷,
       Case
         When Syscolumns.Name In
              (Select Ö÷¼ü = A.Name
                 from Syscolumns A
                Inner Join Sysobjects B On A.Id = B.Id
                                       And B.Xtype = 'U'
                                       And B.Name <> 'Dtproperties'
                Where Exists (Select 1
                         from Sysobjects
                        Where Xtype = 'Pk'
              &


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ʹÓÃset statistics on À´¼ì²ésql tuningµÄ½á¹û


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set
 statistics time on

set
 statistics IO on

set
 statistics profile on

set
 statistics xml on

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Sql Server¸ù¾Ý¼Ç¼¼¯ÅúÁ¿¸üÐÂÊý¾Ý¿â

update   t1   set   t1.value=t2.value   from   t2   where   t1.id=t2.id
 
update jbsite_class  set topicnum = count
from (select t2.classid,count from (
select distinct classid,count(*) as count
from jbsite_product ......

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ALTER PROCEDURE [dbo].[GetUsersList]
@BigClassID int=0,--´óÀà±ðID
@SmallClassID int=0 ,--СÀà±ðID
@pageindex int=1,
@pagesize int=3,
@ret int output --¹²¼¸Ìõ
AS
set rowcount @pagesize
if @SmallClassID>0
begin
select * from(
select id,BigClassName,SmallClassName,UserName,Corporation,r ......
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