利用分析函数实现翻页

 

建表及初始化SQL

--创建表test
create table test(sales_id varchar2(2),sales varchar2(10),dest varchar2(10),dept varchar2(10),revenue number);

--创建数据
insert into test values('11','smith','hangzhou','市场',1000);
insert into test values('12','smith','wenzhou','市场',2000);
insert into test values('13','allen','wenzhou','渠道',3000);
insert into test values('14','allen','wenzhou','渠道',4000);
insert into test values('15','jekch','shanghai','渠道',2500);

 

利用分析函数实现翻页示例

select * from 
(
       select rownum rn, x.* from 
       (
              select count(1) over (partition by p_), m.* from
              (
                     select 1 p_, r.* from 
                     (
                            select * from test
                     ) r
              ) m
       ) x where rownum<=3
) y where y.rn>=2

 

以前的实现

-- 获取总行数
select count(*) from 
(
 select * from test
)

-- 获取目标记录
select * from 
(
       select rownum rn, x.* from 
       (
              select * from test
       ) x where rownum<=3
) y where y.rn>=2

 

 

利用分析函数相比以前的实现，一句搞定，效率更高些

关于分析函数的介绍：

http://blog.csdn.net/yangzy0808/article/details/5713476