摘要: oracle create table users( u_id number(8), u_name varchar2(8), u_sal number(6,2)); 方案一: select u_name,u_salfrom (select users.*,rownum rn from users w 阅读全文
posted @ 2016-09-03 15:51 hoey94 阅读(184) 评论(0) 推荐(0) 编辑