ORACLE中添加删除主键
摘要:
1、创建表的同时创建主键约束(1)无命名create table student (studentid int primary key not null,studentname varchar(8),age int);(2)有命名create table students (studentid int ,studentname varchar(8),age int,constraint yy pr... 阅读全文
posted @ 2009-07-22 17:47 独白 阅读(1389) 评论(0) 推荐(0) 编辑