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在MySQL中使用CHANGE命令的目的？

2026-06-04 1 花语

MySQL中的CHANGE命令用于重命名列名。让我们首先创建一个表-

create table DemoTable796 ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,Name varchar(100),StudentAge int );

让我们检查表的描述-

desc DemoTable796;

这将产生以下输出-

+------------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +------------+--------------+------+-----+---------+----------------+ | StudentId | int(11) | NO | PRI | NULL | auto_increment | | Name | varchar(100) | YES | | NULL | | | StudentAge | int(11) | YES | | NULL | | +------------+--------------+------+-----+---------+----------------+ 3 rows in set (0.00 sec)

以下是在MySQL中使用CHANGE命令的查询-

alter table DemoTable796 change Name StudentName varchar(100); Records: 0 Duplicates: 0 Warnings: 0

让我们再次检查表的描述-

desc DemoTable796;

这将产生以下输出-

+-------------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------+--------------+------+-----+---------+----------------+ | StudentId | int(11) | NO | PRI | NULL | auto_increment | | StudentName | varchar(100) | YES | | NULL | | | StudentAge | int(11) | YES | | NULL | | +-------------+--------------+------+-----+---------+----------------+ 3 rows in set (0.00 sec)