From 71e8da6e9a37ac1dff421a967f5f11a1692cc8f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=B9=B3=E5=B1=B1=E3=80=80=E7=B4=97=E5=B8=86?=
 <26-s-hirayama-stellatecnica@it-college.co.jp>
Date: Tue, 27 Oct 2026 16:59:51 +0900
Subject: [PATCH] =?UTF-8?q?DATABASE=202=E6=97=A5=E7=9B=AE?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 DATABASE_Q2_2_hirayama.txt | 65 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 DATABASE_Q2_2_hirayama.txt

diff --git a/DATABASE_Q2_2_hirayama.txt b/DATABASE_Q2_2_hirayama.txt
new file mode 100644
index 0000000..71a0fb8
--- /dev/null
+++ b/DATABASE_Q2_2_hirayama.txt
@@ -0,0 +1,65 @@
+mysql> SELECT * FROM items;
++---------+------------------------+--------+-------------+
+| item_id | name                   | price  | category_id |
++---------+------------------------+--------+-------------+
+|       1 | ローマのテーブル       | 150000 |           1 |
+|       2 | げーたるーど2000 500ml |    370 |           2 |
+|       3 | 原始肉                 |   2500 |           3 |
+|       4 | 魅惑の椅子             | 100000 |           1 |
++---------+------------------------+--------+-------------+
+4 rows in set (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)
+
+mysql> SELECT * FROM items INNER JOIN item_category USING(category_id) ORDER BY price;
++-------------+---------+------------------------+--------+---------------+
+| category_id | item_id | name                   | price  | category_name |
++-------------+---------+------------------------+--------+---------------+
+|           2 |       2 | げーたるーど2000 500ml |    370 | 飲料          |
+|           3 |       3 | 原始肉                 |   2500 | 食品          |
+|           1 |       4 | 魅惑の椅子             | 100000 | 家具          |
+|           1 |       1 | ローマのテーブル       | 150000 | 家具          |
++-------------+---------+------------------------+--------+---------------+
+4 rows in set (0.00 sec)
+
+mysql> SELECT * FROM items INNER 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 | 魅惑の椅子       | 100000 | 家具          |
++-------------+---------+------------------+--------+---------------+
+2 rows in set (0.00 sec)
+
+mysql> SELECT * FROM items INNER 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)
+
+mysql> SELECT COUNT(*) FROM items;
++----------+
+| COUNT(*) |
++----------+
+|        4 |
++----------+
+1 row in set (0.00 sec)
+
+mysql> SELECT COUNT(*) AS data_count FROM items;
++------------+
+| data_count |
++------------+
+|          4 |
++------------+
+1 row in set (0.00 sec)
+