mysql基础 create table 在指定数据库创建表

•        OS : Ubuntu 18.04.1 LTS
•        DBMS : mysql 8.0.12

示例

stu@Ubuntu:~$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 27
Server version: 8.0.12 MySQL Community Server - GPL

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use db_chinese_medicine;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> create table `t_fruit`(
    -> `id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键,自增长',
    -> `name` varchar(15) NOT NULL COMMENT '名称,唯一',
    -> `count` int(11) NOT NULL COMMENT '数量',
    -> `price` decimal(6,3) NOT NULL COMMENT '每两价格',
    -> `is_sales` tinyint(1) not null default 1 comment'销售状态，1为正在销售,0为停售',
    -> `note` varchar(255) default '无' comment'备注，默认：无',
    -> `gmt_create` datetime NOT NULL COMMENT '创建时间',
    -> `gmt_modified` datetime NOT NULL COMMENT '最后修改时间',
    -> PRIMARY KEY (`id`),
    -> UNIQUE KEY `name` (`name`)
    -> )
    -> ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='果部药物表';
Query OK, 0 rows affected (0.13 sec)

mysql> desc t_fruit;
+--------------+------------------+------+-----+---------+----------------+
| Field        | Type             | Null | Key | Default | Extra          |
+--------------+------------------+------+-----+---------+----------------+
| id           | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| name         | varchar(15)      | NO   | UNI | NULL    |                |
| count        | int(11)          | NO   |     | NULL    |                |
| price        | decimal(6,3)     | NO   |     | NULL    |                |
| is_sales     | tinyint(1)       | NO   |     | 1       |                |
| note         | varchar(255)     | YES  |     | 无      |                |
| gmt_create   | datetime         | NO   |     | NULL    |                |
| gmt_modified | datetime         | NO   |     | NULL    |                |
+--------------+------------------+------+-----+---------+----------------+
8 rows in set (0.00 sec)

mysql> exit
Bye
stu@Ubuntu:~$ 

参考资料

• MySQL创建数据表时设定引擎MyISAM/InnoDB
• MySQL 日期类型及默认设置 （除timestamp类型外，系统不支持其它时间类型字段设置默认值）
• 主键id自增的sql语句
• MySQL中列属性(主键、唯一键和自增等)使用实践
• 数据库创建表的时候加注释
• MYSQL数据库 的 decimal 字段类型

学习资源

• 官方手册
• 官方源码
• Bugs Home
• 测试数据(github)
• 规范 - 参考
• 排名 - 参考
• 墨天轮社区

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