MySQL创建department表结构_MySQL数据表的基本操作二：表结构修改

一、查看数据表结构

1) 查看表基本结构语句 DESCRIBE

语法：DESCRIBE 表名;

示例：

mysql> DESCRIBE product;

+--------------+--------------+------+-----+---------+----------------+

| Field | Type | Null | Key | Default | Extra |

+--------------+--------------+------+-----+---------+----------------+

| product_id | int(11) | NO | PRI | NULL | auto_increment |

| product_name | varchar(50) | NO | | NULL | |

| description | varchar(200) | YES | | NULL | |

+--------------+--------------+------+-----+---------+----------------+

语法：DESC 表名;

示例：

mysql> DESC product;

+--------------+--------------+------+-----+---------+----------------+

| Field | Type | Null | Key | Default | Extra |

+--------