diff --git a/【練習問題】 SQL/Question2/Q2回答.txt b/【練習問題】 SQL/Question2/Q2回答.txt
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+++ b/【練習問題】 SQL/Question2/Q2回答.txt	
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+mysql> CREATE TABLE item_category (
+    -> category_id INT,
+    -> category_name VARCHAR(256)
+    -> );
+Query OK, 0 rows affected (0.02 sec)
+
+mysql> INSERT INTO item_category VALUES (1, '家具');
+Query OK, 1 row affected (0.00 sec)
+
+mysql> INSERT INTO item_category VALUES (2, '飲料');
+Query OK, 1 row affected (0.00 sec)
+
+mysql> INSERT INTO item_category VALUES (3, '食品');
+Query OK, 1 row affected (0.01 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> CREATE TABLE items (
+    -> item_id INT,
+    -> name VARCHAR(256),
+    -> price INT,
+    -> category_id INT
+    -> );
+Query OK, 0 rows affected (0.02 sec)
+
+mysql> INSERT INTO items VALUES (1, 'ローマのテーブル', 150000, 1);
+Query OK, 1 row affected (0.01 sec)
+
+mysql> INSERT INTO items VALUES (2, 'げーたるーど2000 500ml', 370, 2);
+Query OK, 1 row affected (0.01 sec)
+
+mysql> INSERT INTO items VALUES (3, '原始肉', 2500, 3);l
+Query OK, 1 row affected (0.01 sec)
+
+    -> INSERT INTO items VALUES (4, '魅惑の椅子', 100000, 1);
+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 'l
+INSERT INTO items VALUES (4, '魅惑の椅子', 100000, 1)' at line 1
+mysql> INSERT INTO items VALUES (3, '原始肉', 2500, 3);
+Query OK, 1 row affected (0.00 sec)
+
+mysql> INSERT INTO items VALUES (4, '魅惑の椅子', 100000, 1);
+Query OK, 1 row affected (0.01 sec)
+
+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 |
+|       3 | 原始肉                 |   2500 |           3 |
+|       4 | 魅惑の椅子             | 100000 |           1 |
++---------+------------------------+--------+-------------+
+5 rows in set (0.00 sec)
+
+mysql> DELETE FROM items WHERE item_id = 3;
+Query OK, 2 rows affected (0.00 sec)
+
+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 |
+|       4 | 魅惑の椅子             | 100000 |           1 |
++---------+------------------------+--------+-------------+
+3 rows in set (0.00 sec)
+
+mysql> INSERT INTO items VALUES (3, '原始肉', 2500, 3);
+Query OK, 1 row affected (0.01 sec)
+
+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 |
+|       4 | 魅惑の椅子             | 100000 |           1 |
+|       3 | 原始肉                 |   2500 |           3 |
++---------+------------------------+--------+-------------+
+4 rows in set (0.00 sec)
+
+mysql> DELETE FROM items WHERE item_id = 4;
+Query OK, 1 row affected (0.01 sec)
+
+mysql> INSERT INTO items VALUES (4, '魅惑の椅子', 100000, 1);
+Query OK, 1 row affected (0.01 sec)
+
+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 items.category_id, items.item_id, items.name, items.price, item_category.category_name FROM items INNER JOIN item_category ON items.category_id = item_category.category_id;
++-------------+---------+------------------------+--------+---------------+
+| category_id | item_id | name                   | price  | category_name |
++-------------+---------+------------------------+--------+---------------+
+|           1 |       1 | ローマのテーブル       | 150000 | 家具          |
+|           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          |
++-------------+---------+------------------------+--------+---------------+
+4 rows in set (0.00 sec)
+
+mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name FROM items INNER JOIN item_category ON items.category_id = item_category.category_id ORDER BY price ASC;
++-------------+---------+------------------------+--------+---------------+
+| 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 items.category_id, items.item_id, items.name, items.price, item_category.category_name FROM items INNER JOIN item_category ON items.category_id = item_category.category_id AND items.category_id = 1;
++-------------+---------+------------------+--------+---------------+
+| 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 items.category_id, items.item_id, items.name, items.price, item_category.category_name FROM items INNER JOIN item_category ON items.category_id = item_category.category_id AND 1000 <= items.price AND items.price <= 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(*) AS data_count FROM items;
++------------+
+| data_count |
++------------+
+|          4 |
++------------+
+1 row in set (0.00 sec)
+
+mysql> CREATE TABLE items_category AS SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name FROM items INNER JOIN item_category ON items.category_id = item_category.category_id ORDER BY price ASC;
+Query OK, 4 rows affected (0.03 sec)
+Records: 4  Duplicates: 0  Warnings: 0
+
+mysql> SELECT * FROM items_category WHERE price = (SELECT MAX(price) FROM items_category);
++-------------+---------+------------------+--------+---------------+
+| category_id | item_id | name             | price  | category_name |
++-------------+---------+------------------+--------+---------------+
+|           1 |       1 | ローマのテーブル | 150000 | 家具          |
++-------------+---------+------------------+--------+---------------+
+1 row in set (0.00 sec)
+
+mysql> SELECT * FROM items_category WHERE name LIKE '%の%';
++-------------+---------+------------------+--------+---------------+
+| category_id | item_id | name             | price  | category_name |
++-------------+---------+------------------+--------+---------------+
+|           1 |       4 | 魅惑の椅子       | 100000 | 家具          |
+|           1 |       1 | ローマのテーブル | 150000 | 家具          |
++-------------+---------+------------------+--------+---------------+
+2 rows in set (0.00 sec)
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