1、错误描述

ORA-00957: 重复的列名

2、错误原因

SQL> create table info(  2     stu_id varchar2(7) not null,   3     stu_name varchar2(20) not null,  4     stu_age varchar(2) not null,  5     stu_age number(2) not null,  6     stu_seat number(2) not null,  7     enter_date date,  8     stu_add varchar2(100) default '',  9     class_no varchar2(4) not null 10  ); create table info(   stu_id varchar(7) not null,   stu_name varchar2(20) not null,   stu_age varchar(2) not null,   stu_age number(2) not null,   stu_seat number(2) not null,   enter_date date,   stu_add varchar2(100) default '',   class_no varchar2(4) not null) 

创建数据库表时，定义了同名字段stu_age，所以报错

3、解决办法

create table info(   stu_id varchar(7) not null,   stu_name varchar2(20) not null,   stu_age varchar(2) not null,   stu_seat number(2) not null,   enter_date date,   stu_add varchar2(100) default '',   class_no varchar2(4) not null)

去掉一个stu_age字段