摘要: 端午有人休息,有人忙 操作前数据: --从排序后的结果集中删除 前n条记录delete from emp where empno in (select empno from (select * from emp where comm is not null and rownum < &n order 阅读全文
posted @ 2017-05-30 17:15 Oracle-fans 阅读(1160) 评论(0) 推荐(0) 编辑