資料，資料，命根就在資料 ! 操作資料庫時，一定要謹慎小心。師萬物 的程式碼看看就好，要有自己的判斷。遇到抉擇，要不恥上下問。

example

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 '主鍵,自增長',
    -> `name` varchar(15) NOT NULL COMMENT '名稱,唯一',
    -> `count` int
 
(11) NOT NULL COMMENT '數量',
    -> `price` decimal(6,3) NOT NULL COMMENT '每兩價格',
    -> `is_sales` tinyint(1) not null default 1 comment'銷售狀態，1為正在銷售,0為停售',
    -> `note` varchar(255) default '無' comment'備註，預設：無',
    -> `gmt_create` datetime NOT NULL COMMENT '建立時間',
    -> `gmt_modified` datetime NOT NULL COMMENT '最後修改時間',
    -> PRIMARY KEY (`id`),
    -> UNIQUE KEY `name` (`name`)
    -> )
    -> ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='果部藥物表';
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  |     | 無      |                |
| gmt_create   | datetime         | NO   |     | NULL    |                |
| gmt_modified | datetime         | NO   |     | NULL    |                |
+--------------+------------------+------+-----+---------+----------------+
8 rows in set (0.00 sec)

mysql> exit
Bye
stu@Ubuntu:~$ 

reference

resource

MySQL是一個關係型資料庫管理系統，目前是開源的(2018-10)。
許可權明確，引擎與字符集等選擇恰當，命名規範。
MariaDB，Redis，MongoDB，PostgreSQL，Hive，HBase等，多作了解，拓寬心量。
Workbench，phpMyAdmin，Navicat等圖形化管理工具，需要細心使用，豫兮若冬涉川。