mysql查看表字段_mysql如何查询表字所有字段？

mysql查询表字所有字段的方法：使用“SHOW FROM”语句配合FULL关键字来查询，语法“SHOW FULL COLUMNS FROM table_name”，可以显示指定数据表的所有字段信息。

mysql查询表字所有字段

1、查看所有表名：show tables [from db_name];

2、查看字段信息SHOW FULL COLUMNS FROM table_name

获取以下信息

Field ：字段名

Type：字段类型

Collation：字符集(mysql 5.0以上有)

Null ：是否可以为NULL

Key：索引(PRI,unique,index)

Default：缺省值

Extra：额外(是否 auto_increment)

Privileges：权限

Comment：备注(mysql 5.0以上有)mysql> create table teacher # 创建teacher表

-> (

-> Id int (5) auto_increment not null primary key,

-> name char(10) not null,

-> address varchar(50) default 'No.1 Mid school',

-> year date

-> );

Query OK, 0 rows affected (0.02 sec)

mysql> show tables;

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

| Tables_in_school |

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

| teacher |

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

1 row in set (0.00 sec)

mysql> show full columns from teacher; # 显示teacher表的所有字段

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

| Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment |

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

| Id | int(5) | NULL | NO | PRI | NULL | auto_increment | select,insert,update,references | |

| name | char(10) | latin1_swedish_ci | NO | | NULL | | select,insert,update,references | |

| address | varchar(50) | latin1_swedish_ci | YES | | No.1 Mid school | | select,insert,update,references | |

| year | date | NULL | YES | | NULL | | select,insert,update,references | |

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

4 rows in set (0.01 sec)

mysql> drop table teacher; # 删除teacher表

Query OK, 0 rows affected (0.03 sec)

mysql> show tables;

Empty set (0.00 sec)

mysql>