摘要: 删除的几种方法: (1)通过建立临时表来实现 SQL>create table temp_emp as (select distinct * from employee) SQL> truncate table employee; (清空employee表的数据) SQL> insert into employee select * from temp_emp; (再将临时... 阅读全文
posted @ 2009-10-28 16:35 Zoya Qiu 阅读(428) 评论(0) 推荐(0) 编辑