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SELECT   id,rown  
      from   (SELECT   id,   ROWNUM   rown  
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                                        WHERE   (************)  
                                  ORDER   BY   ********)  
                    WHERE   ROWNUM   <=   ÿҳÌõÊý*Ò³ºÅ)  
    WHERE   (rown   BETWEEN   ÿҳÌõÊý*Ò³ºÅ-£¨Ã¿Ò³ÌõÊý-1£©   AND   ÿҳÌõÊý*Ò³ºÅ)  
   
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select * from (
select rownum r,a from yourtable
where rownum <= 20
order by name )
where r > 10
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select * from
     (select rownum r , e.*
     --¸ù¾ÝÌõ¼þ²éÕÒ³öËùÒªµÄ¼Ç¼      
       from
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where r between ÆðʼÐР and   ½áÊøÐÐ
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