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SQL Server2005¶Áȡע²á±í
DECLARE @result varchar(255)
EXEC master.dbo.xp_regread 'HKEY_LOCAL_MACHINE','SOFTWARE\OperationControlSystem\ClientID','Prefix',@result OUT ---×¢Òâ±ØÐëÓÐOUT·ñÔò@resultΪ¿Õ
SELECT @result
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SQL Server2000 ½âÎöXML

DECLARE @HDOC INT --Îĵµ¾ä±ú
DECLARE @XMLSTRING VARCHAR(200) --XML×Ö·û´®
SET @xmlString ='<?xml version="1.0"?>
<ROOT>
<USER ID="1" Name="SBQCEL"/>
<USER ID="2" Name="PEACELI"/>
<USER ID="3" Name="SHEEPCHANG"/>
</ROOT>'
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Sql Server ¶ÔxmlÀàÐ͵IJÙ×÷

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 <OLDVALUE>
  <H_Action id="1130">030</H_Action>
  <D_Action>030</D_Action>
  <OrderCompany>00220</OrderCompany>
  <OrderNumber>10004035</OrderNumber> ......

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¼ÙÉ裬±íÃûΪ T1 ×Ó¶ÎΪ A,B,C
select count(*) ,A,B,C from T1
   group by A,B,C having count(*) > 1
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