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  • MySQL 创建数据表

    MySQL 创建数据库

    1、选择要操作的数据库

    命令:USE dbname

    mysql> USE java407
    Database changed

    2、查看要操作的数据库中的所有数据表

    命令:SHOW TABLES;

    mysql> SHOW TABLES;
    Empty set (0.00 sec)

    3、创建数据表

    命令:

    mysql> CREATE TABLE users (
        -> id INT(10) NOT NULL AUTO_INCREMENT,
        -> username VARCHAR(16) NOT NULL,
        -> password VARCHAR(16) NOT NULL,
        -> sex CHAR(2) NOT NULL,
        -> age INT(3) NULL,
        -> birth DATE NULL,
        -> PRIMARY KEY(id));
    Query OK, 0 rows affected (0.69 sec)

    4、查看要操作的数据库中的所有数据表

    命令:SHOW TABLES;

    mysql> SHOW TABLES;
    +-------------------+
    | Tables_in_java407 |
    +-------------------+
    | users             |
    +-------------------+
    1 row in set (0.00 sec)

    5、查看数据表定义

    mysql> DESC users;
    +----------+-------------+------+-----+---------+----------------+
    | Field    | Type        | Null | Key | Default | Extra          |
    +----------+-------------+------+-----+---------+----------------+
    | id       | int(10)     | NO   | PRI | NULL    | auto_increment |
    | username | varchar(16) | NO   |     | NULL    |                |
    | password | varchar(16) | NO   |     | NULL    |                |
    | sex      | char(2)     | NO   |     | NULL    |                |
    | age      | int(3)      | YES  |     | NULL    |                |
    | birth    | date        | YES  |     | NULL    |                |
    +----------+-------------+------+-----+---------+----------------+
    6 rows in set (0.00 sec)
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  • 原文地址:https://www.cnblogs.com/Satu/p/10652546.html
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