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  aId  objId remark    mTime    title
  1    11    ÎÞ    2008-11-12  num01
  2    2      ÎÞ    2008-11-13  num02
  3    5      ÎÞ    2008-11-10  num01
  4    2      ÎÞ    2008-11-05  num03
  5    5      ÎÞ    2008-11-09  num01
  6    2      ÎÞ    2008-11-23  num08

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  6    2    ÎÞ    2008-11-23  num01
  1    11    ÎÞ    2008-11-12  num01
  3    5    ÎÞ    2008-11-10  num08


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SELECT * from TB T WHERE ID=(SELECT MAX(ID) from TB WHERE objId=T.objId)


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SQL code:
select aId,objId ,remark,mTime,title


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