www.qnmk.net > orAClE 怎么查询 一个表中的 最后 10条数据

orAClE 怎么查询 一个表中的 最后 10条数据

比如说主键是id字段 select * from (select * from table order by id desc) where rownum

1、通过rownum对数据库的记录进行编号 SELECT ROWNUM RN1,A.* FROM A;//从表A中获取记录,并用rownum生成RN12、通过RN1的标记进行倒序排序 SELECT B.*,ROWNUM RN2 FROM (SELECT ROWNUM RN1,A.* FROM A) ORDER BY RN1 DESC;3、通过RN2取小于等于1...

用子查询可以实现 SELECT * FROM ( select * from table where xxx order by xx desc )where rownum

SELECT * FROM (SELECT * FROM ( SELECT ROWNUM AS SNO,...(表的其他列) FROM DAT_PEV_SCRIPT ) A ORDER BY A.SNO DESC ) B WHERE ROWNUM = 10 以上是参考,SNO是自动递增编号。

下面是关于rownum的介绍================================Rownum和row_number() over()的使用ROWNUM是Oracle从8开始提供的一个伪列,是把SQL出来的结果进行编号,始终从1开始,常见的用途就是用来分页输出.比如SELECT *FROM torderdetail aWHERE...

假设查询的是第20行前后10条数据 前十条 select * from tb where rownum < 20 minus select * from tb where rownum =< 9 后十条 类似的写法

select * from (select t.*, rownum as rn from tab t) where rn between 10 and 20

例如: SELECT * FROM EMP WHERE ROWNUM

实现例句如下: SELECT a.* FROM table1 a WHERE NOT EXISTS (SELECT 1 FROM table1 b WHERE b.id>a.id) 或者 SELECT * FROM table1 WHERE id IN (SELECT Max(id) FROM table1) 又或者 SELECT * FROM table1 WHERE id=(SELECT Max(id) FROM table1)

select * from (select f_jqid,max(f_ssyhs) from t_scenicday group by f_jqid order by max(f_ssyhs) desc) where rownum

网站地图

All rights reserved Powered by www.qnmk.net

copyright ©right 2010-2021。
www.qnmk.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com