From 8447f34aa5103974bae8055e0f4211b5d394a120 Mon Sep 17 00:00:00 2001
From: "h.hein" <26-h-kyaw-sakuracommunication@it-college.co.jp>
Date: Mon, 28 Sep 2026 13:01:36 +0900
Subject: [PATCH] Question 2 Done

---
 【練習問題】 SQL/Question2/Question2.txt | 132 +++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 【練習問題】 SQL/Question2/Question2.txt

diff --git a/【練習問題】 SQL/Question2/Question2.txt b/【練習問題】 SQL/Question2/Question2.txt
new file mode 100644
index 0000000..2bf6814
--- /dev/null
+++ b/【練習問題】 SQL/Question2/Question2.txt	
@@ -0,0 +1,132 @@
+問題1
+mysql> CREATE TABLE item_category (
+    ->     category_id INT AUTO_INCREMENT PRIMARY KEY,
+    ->     category_name VARCHAR(256) NOT NULL
+    -> );
+Query OK, 0 rows affected (0.03 sec)
+
+mysql> INSERT INTO item_category ('家具');
+ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''家具')' at line 1
+mysql> ^C
+mysql>
+mysql> INSERT INTO item_category (category_name) VALUES ('家具');
+Query OK, 1 row affected (0.01 sec)
+
+mysql> INSERT INTO item_category (category_name) VALUES ('飲料');
+Query OK, 1 row affected (0.00 sec)
+
+mysql> INSERT INTO item_category (category_name) VALUES ('食品');
+Query OK, 1 row affected (0.00 sec)
+
+mysql> SELECT * FROM item_category;
++-------------+---------------+
+| category_id | category_name |
++-------------+---------------+
+|           1 | 家具          |
+|           2 | 飲料          |
+|           3 | 食品          |
++-------------+---------------+
+3 rows in set (0.00 sec)
+
+問題２
+CREATE TABLE items ( item_id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(256), price INT, category_id INT, FOREIGN KEY (category_id) REFERENCES item_category(category_id));
+
+INSERT INTO items (name, price, category_id)
+    -> VALUES ('ローマのテーブル', 150000, 1);
+INSERT INTO items (name, price, category_id) VALUES ('げーたるど2000 500 ml', 370, 2);
+mysql> INSERT INTO items (name, price, category_id) VALUES ('原始肉', 2500, 3);
+Query OK, 1 row affected (0.00 sec)
+
+mysql> INSERT INTO items (name, price, category_id) VALUES ('魅惑の橋子', 100000, 1);
+Query OK, 1 row affected (0.00 sec)
+問題３
+SELECT * FROM items JOIN item_category USING (category_id);
++-------------+---------+-----------------------+--------+---------------+
+| category_id | item_id | name                  | price  | category_name |
++-------------+---------+-----------------------+--------+---------------+
+|           1 |       1 | ローマのテーブル      | 150000 | 家具          |
+|           1 |       4 | 魅惑の橋子            | 100000 | 家具          |
+|           2 |       2 | げーたるど2000 500 ml |    370 | 飲料          |
+|           3 |       3 | 原始肉                |   2500 | 食品          |
++-------------+---------+-----------------------+--------+---------------+
+4 rows in set (0.00 sec)
+
+問題４
+SELECT * 
+FROM items 
+JOIN item_category USING (category_id)
+ORDER BY price ASC;
++-------------+---------+-----------------------+--------+---------------+
+| category_id | item_id | name                  | price  | category_name |
++-------------+---------+-----------------------+--------+---------------+
+|           2 |       2 | げーたるど2000 500 ml |    370 | 飲料          |
+|           3 |       3 | 原始肉                |   2500 | 食品          |
+|           1 |       4 | 魅惑の橋子            | 100000 | 家具          |
+|           1 |       1 | ローマのテーブル      | 150000 | 家具          |
++-------------+---------+-----------------------+--------+---------------+
+4 rows in set (0.00 sec)
+
+問題５
+ SELECT * FROM items JOIN item_category USING (category_id) WHERE category_name = '家具';
++-------------+---------+------------------+--------+---------------+
+| category_id | item_id | name             | price  | category_name |
++-------------+---------+------------------+--------+---------------+
+|           1 |       1 | ローマのテーブル | 150000 | 家具          |
+|           1 |       4 | 魅惑の橋子       | 100000 | 家具          |
++-------------+---------+------------------+--------+---------------+
+2 rows in set (0.00 sec)
+
+問題　６
+mysql> SELECT * FROM items JOIN item_category USING (category_id) WHERE price BETWEEN 1000 AND 50000;
++-------------+---------+--------+-------+---------------+
+| category_id | item_id | name   | price | category_name |
++-------------+---------+--------+-------+---------------+
+|           3 |       3 | 原始肉 |  2500 | 食品          |
++-------------+---------+--------+-------+---------------+
+1 row in set (0.00 sec)
+
+問題７
+mysql> SELECT COUNT(*) AS total_items FROM items;
++-------------+
+| total_items |
++-------------+
+|           4 |
++-------------+
+1 row in set (0.00 sec)
+
+問題８
+mysql> SELECT * FROM items WHERE price = (SELECT MAX(price) FROM items);
++---------+------------------+--------+-------------+
+| item_id | name             | price  | category_id |
++---------+------------------+--------+-------------+
+|       1 | ローマのテーブル | 150000 |           1 |
++---------+------------------+--------+-------------+
+1 row in set (0.00 sec)
+
+問題９
+
+
+mysql> SELECT * FROM items WHERE name LIKE '%の%';
++---------+------------------+--------+-------------+
+| item_id | name             | price  | category_id |
++---------+------------------+--------+-------------+
+|       1 | ローマのテーブル | 150000 |           1 |
+|       4 | 魅惑の橋子       | 100000 |           1 |
++---------+------------------+--------+-------------+
+2 rows in set (0.00 sec)
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