1. Environment

• WSL (Ubuntu 25.10)
• Docker 29.3.1
• mysql/mysql-server:8.0.32

2. Reference

MySQL Tutorial - W3Schools

3. Docker

3-1. Setup MySQL

$ docker build
$ docker-compose up -d

3-2. Create DB, Tables and Insert Records

$ docker-compose exec db mysql -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.32 MySQL Community Server - GPL

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

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> source setup.sql

4. SQL Introduction

4-1. List Up Databases

mysql> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sql_tutorial       |
| sys                |
+--------------------+

4-2. Switch to a Specific Database

mysql> USE sql_tutorial;
Database changed
mysql> SHOW TABLES;
+------------------------+
| Tables_in_sql_tutorial |
+------------------------+
| Categories             |
| Customers              |
| Employees              |
| OrderDetails           |
| Orders                 |
| Products               |
| Shippers               |
| Suppliers              |
+------------------------+

4-3. Check Schema of a Specific Table

mysql> DESCRIBE Employees;
+-----------+--------------+------+-----+---------+-------+
| Field     | Type         | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------+-------+
| ID        | int          | NO   | PRI | NULL    |       |
| LastName  | varchar(255) | YES  |     | NULL    |       |
| FirstName | varchar(255) | YES  |     | NULL    |       |
| BirthDate | date         | YES  |     | NULL    |       |
| Photo     | varchar(255) | YES  |     | NULL    |       |
| Notes     | longtext     | YES  |     | NULL    |       |
+-----------+--------------+------+-----+---------+-------+

4-4. Fetch a Specific Column

You can use * if you would like to fetch all columns.

mysql> SELECT ID FROM Employees;
+----+
| ID |
+----+
|  1 |
|  2 |
|  3 |
|  4 |
|  5 |
|  6 |
|  7 |
|  8 |
|  9 |
+----+

5. Schemas

5-1. Categories

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
Name	varchar(255)	YES		NULL
Description	varchar(255)	YES		NULL

5-2. Customers

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
FullName	varchar(255)	YES		NULL
ContactName	varchar(255)	YES		NULL
Address	varchar(255)	YES		NULL
City	varchar(255)	YES		NULL
ZipCode	varchar(255)	YES		NULL
Country	varchar(255)	YES		NULL

5-3. Employees

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
LastName	varchar(255)	YES		NULL
FirstName	varchar(255)	YES		NULL
BirthDate	date	YES		NULL
Photo	varchar(255)	YES		NULL
Notes	longtext	YES		NULL

5-4. Orders

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
OrderDate	date	YES		NULL
CustomerID	int	YES	MUL	NULL
EmployeeID	int	YES	MUL	NULL
ShipperID	int	YES	MUL	NULL

5-5. OrderDetails

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
Quantity	int	YES		NULL
OrderID	int	YES	MUL	NULL
ProductID	int	YES	MUL	NULL

5-6. Products

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
Name	varchar(255)	YES		NULL
Unit	varchar(255)	YES		NULL
Price	float	YES		NULL
CategoryID	int	YES	MUL	NULL
SupplierID	int	YES	MUL	NULL

5-7. Shippers

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
Name	varchar(255)	YES		NULL
Phone	varchar(255)	YES		NULL

5-8. Suppliers

Field	Type	Null	Key	Default	Extra
ID	int	NO	PRI	NULL
Name	varchar(255)	YES		NULL
ContactName	varchar(255)	YES		NULL
Address	varchar(255)	YES		NULL
City	varchar(255)	YES		NULL
ZipCode	varchar(255)	YES		NULL
Country	varchar(255)	YES		NULL
Phone	varchar(255)	YES		NULL