oralce sql 分页

create table  student (
 sid varchar2(10), --学号
 sname varchar2(10), --姓名
 classid varchar2(10), --班级号
 score  int   --分数
);

insert into  student values('001','z001','1',80);
insert into  student values('002','z001','1',90);
insert into  student values('003','z001','1',70);
insert into  student values('004','z001','1',90);
insert into  student values('005','z001','1',80);
insert into  student values('006','z001','1',70);

insert into  student values('007','z001','2',60);
insert into  student values('008','z001','2',70);
insert into  student values('009','z001','2',50);
insert into  student values('010','z001','2',70);
insert into  student values('011','z001','2',60);
insert into  student values('012','z001','2',50);

分页方法一： 用rownum  伪列进行分页：

   SELECT   t.*  　FROM   (SELECT  s.*,ROWNUM rn    FROM  student s  WHERE  ROWNUM <=9)  t  WHERE  rn >= 8;

方法二：利用分析函数；

 select * from (select t.*,row_number() over(order by SID desc) rk from student t) where rk<10 and rk>7;