如何修改mysql数据库表结构

修改mysql数据库表结构的方法：1、查看表结构；2、添加列；3、删除列，代码为【mysql> alter table student drop column birthday】；4、修改列，代码为【mysql> alter table】。

本教程操作环境：windows7系统、mysql8.0.22版，该方法适用于所有品牌电脑。

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修改mysql数据库表结构的方法：

1、查看表结构

mysql> show create table student; +---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table   | Create Table                                                                                                                                                                                          | +---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | student | CREATE TABLE `student` (   `ID` int(11) NOT NULL AUTO_INCREMENT,   `NAME` varchar(20) NOT NULL,   `AGE` int(11) NOT NULL,   PRIMARY KEY (`ID`) ) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8 | +---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.09 sec)

2、添加列

mysql> alter table student add column birthday datetime; Query OK, 0 rows affected (2.06 sec) Records: 0  Duplicates: 0  Warnings: 0

3、删除列

mysql> alter table student drop column birthday; Query OK, 0 rows affected (0.80 sec) Records: 0  Duplicates: 0  Warnings: 0

4、修改列

--1.修改列的类型 mysql> alter table student modify age int not null; Query OK, 0 rows affected (0.09 sec) Records: 0  Duplicates: 0  Warnings: 0   --2.修改列的名称 mysql> alter table student change column name sname varchar(20); Query OK, 0 rows affected (1.31 sec) Records: 0  Duplicates: 0  Warnings: 0

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