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分页查询

  • MySql
     select tablename.*  from  tablename limit firstIndex,pageSize;
          firstIndex -------->开始索引
          pageSize--------->页大小
  • Oracle
  1.         select * from (
                           select a.*,ROWNUM rn from tablename a where ROWNUM<=(firstIndex+pageSize)
                          ) where rn>firstIndex;
 

     2.         select * from(select * from(select p.*,ROWNUM rn from tablename )p  where p.rownumber>firstIndex)  where rownum>pageSize;

分页查询