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http://hi.baidu.com/bilbit/blog/item/5ed5de16a6f6b412962b43eb.html
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select count(*) ,A,B,C from T1
group by A,B,C having count(*) > 1
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A100 B100 C100
A101 B101 C101
A102 B102 C102
A102 B102 C100
A102 B102 C102
A102 B102 C102
A100 B100 C100
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2 A100 B100 C100
3 A102 B102 C102
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SET @XML='<root>
<OLDVALUE>
<H_Action id="1130">030</H_Action>
<D_Action>030</D_Action>
<OrderCompany>00220</OrderCompany>
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DECIMAL[(P[, S])]
NUMBER[(P[, S])]
NUMERIC[(P[, S])]
NUMBER[(P[, S])]
FLOAT[(N)]
NUMBER[(N)]
INT
NUMBER
SMALLINT
NUMBER
TINYINT
NUMBER
MONEY
NUMBER[19,4]
SM ......
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http://blog.csdn.net/tobeistdo/archive/2009/11/12/4797534.aspx
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where peopleId in (select peopleId from people group by peopleId ha ......
SQLÓÃselectÓï¾ä²éÑ¯ÖØ¸´¼Ç¼
http://hi.baidu.com/bilbit/blog/item/5ed5de16a6f6b412962b43eb.html
ÓÃselectÓï¾ä£¬²éÑ¯ÖØ¸´¼Ç¼
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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A100 &n ......