--创建表
create table student
(sno char(8) primary key,
sname char(10),
gender char(2),
department char(20),
age int)
--修改学号长度
alter table student alter column name char(10) not null;
--删除表
drop table student
--创建表
create table student
(sno char(8) primary key,
sname char(10),
gender char(2),
department char(20),
age int)
--修改学号长度
alter table student alter column name char(10) not null;
--删除表
drop table student