How to query all fields of a table in mysql?

Mysql method of querying all fields of a table: Use the "SHOW FROM" statement with the FULL keyword to query. The syntax "SHOW FULL COLUMNS FROM table_name" can display all field information of the specified data table.

mysql query all fields of table words

1. View all table names:

show tables [from db_name];

2. View field information

SHOW FULL COLUMNS FROM table_name

Get the following information
Field: Field name
Type: Field type
Collation: Character set (mysql 5.0 or above) )
Null: Can it be NULL
Key: Index (PRI, unique, index)
Default: Default value
Extra: Extra (whether auto_increment)
Privileges: Permissions
Comment: Remarks (available for mysql 5.0 and above)

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>

Recommended tutorial: mysql video tutorial

The above is the detailed content of How to query all fields of a table in mysql?. For more information, please follow other related articles on the PHP Chinese website!