ORACLE分页SQL语句

转自:http://www.cnblogs.com/hxw/archive/2005/09/11/234619.html

1.根据ROWID来分

select * from t_xiaoxi where rowid in(select rid from (select rownum rn,rid from(select rowid rid,cid from

t_xiaoxi  order by cid desc) where rownum<10000) where rn>9980) order by cid desc;

执行时间0.03秒
2.按分析函数来分

select * from (select t.*,row_number() over(order by cid desc) rk from t_xiaoxi t) where rk<10000 and rk>9980;

执行时间1.01秒
3.按ROWNUM来分

select * from(select t.*,rownum rn from(select * from t_xiaoxi order by cid desc) t where rownum<10000) where

rn>9980;

执行时间0.1秒
其中t_xiaoxi为表名称,cid为表的关键字段,取按CID降序排序后的第9981-9999条记录,t_xiaoxi表有70000多条记录
个人感觉1的效率最好,3次之,2最差

posted @ 2013-03-25 01:03  horizon~~~  阅读(158)  评论(0编辑  收藏  举报