摘要: 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 rownum9980) order by cid desc;执行时间0.03秒2.按分析函... 阅读全文
posted @ 2009-04-20 11:39 无很 阅读(155) 评论(0) 推荐(0) 编辑