diff --git a/【練習問題】 SQL/Question1/Q1回答.txt b/【練習問題】 SQL/Question1/Q1回答.txt
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+mysql> CREATE TABLE book_table (
+    -> book_id INT,
+    -> book_name VARCHAR(50),
+    -> author_name VARCHAR(50),
+    -> price INT,
+    -> sales_flag INT
+    -> );
+Query OK, 0 rows affected (0.03 sec)
+
+mysql> INSERT INTO book_table VALUES (10001, 'TwoPeace', '三田栄一郎', 420, 1);
+Query OK, 1 row affected (0.02 sec)
+
+mysql> INSERT INTO book_table VALUES (10002, '名探偵金田二', '青山ふみや', 460, 1);
+Query OK, 1 row affected (0.01 sec)
+
+mysql> INSERT INTO book_table VALUES (20001, '坊ちゃま', '冬目漱岩', 460, 1);
+Query OK, 1 row affected (0.01 sec)
+
+mysql> INSERT INTO book_table VALUES (30001, '西方見聞録', '不明', 1000, 1);
+Query OK, 1 row affected (0.01 sec)
+
+mysql> INSERT INTO book_table VALUES (40010, '吾輩は犬である', '冬目漱岩', 420, 1);
+Query OK, 1 row affected (0.00 sec)
+
+mysql> SELECT * FROM book_table;
++---------+----------------+-------------+-------+------------+
+| book_id | book_name      | author_name | price | sales_flag |
++---------+----------------+-------------+-------+------------+
+|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
+|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
+|   20001 | 坊ちゃま       | 冬目漱岩    |   460 |          1 |
+|   30001 | 西方見聞録     | 不明        |  1000 |          1 |
+|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
++---------+----------------+-------------+-------+------------+
+5 rows in set (0.00 sec)
+
+mysql> SELECT book_name , author_name FROM book_table;
++----------------+-------------+
+| book_name      | author_name |
++----------------+-------------+
+| TwoPeace       | 三田栄一郎  |
+| 名探偵金田二   | 青山ふみや  |
+| 坊ちゃま       | 冬目漱岩    |
+| 西方見聞録     | 不明        |
+| 吾輩は犬である | 冬目漱岩    |
++----------------+-------------+
+5 rows in set (0.00 sec)
+
+mysql> SELECT * FROM book_table;
++---------+----------------+-------------+-------+------------+
+| book_id | book_name      | author_name | price | sales_flag |
++---------+----------------+-------------+-------+------------+
+|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
+|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
+|   20001 | 坊ちゃま       | 冬目漱岩    |   460 |          1 |
+|   30001 | 西方見聞録     | 不明        |  1000 |          0 |
+|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
++---------+----------------+-------------+-------+------------+
+5 rows in set (0.00 sec)
+
+mysql> SELECT * FROM book_table WHERE sales_flag = 1;
++---------+----------------+-------------+-------+------------+
+| book_id | book_name      | author_name | price | sales_flag |
++---------+----------------+-------------+-------+------------+
+|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
+|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
+|   20001 | 坊ちゃま       | 冬目漱岩    |   460 |          1 |
+|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
++---------+----------------+-------------+-------+------------+
+4 rows in set (0.00 sec)
+
+mysql> SELECT * FROM book_table WHERE author_name = '冬目漱岩' AND price = 420;
++---------+----------------+-------------+-------+------------+
+| book_id | book_name      | author_name | price | sales_flag |
++---------+----------------+-------------+-------+------------+
+|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
++---------+----------------+-------------+-------+------------+
+1 row in set (0.00 sec)
+
+mysql> SELECT * FROM book_table;
++---------+----------------+-------------+-------+------------+
+| book_id | book_name      | author_name | price | sales_flag |
++---------+----------------+-------------+-------+------------+
+|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
+|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
+|   30001 | 西方見聞録     | 不明        |  1000 |          0 |
+|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
++---------+----------------+-------------+-------+------------+
+4 rows in set (0.00 sec)
+
+mysql> UPDATE book_table SET author_name = 'マール＝コー＝ポロ' WHERE book_id = 30001;
+Query OK, 1 row affected (0.00 sec)
+Rows matched: 1  Changed: 1  Warnings: 0
+
+mysql> SELECT * FROM book_table;
++---------+----------------+--------------------+-------+------------+
+| book_id | book_name      | author_name        | price | sales_flag |
++---------+----------------+--------------------+-------+------------+
+|   10001 | TwoPeace       | 三田栄一郎         |   420 |          1 |
+|   10002 | 名探偵金田二   | 青山ふみや         |   460 |          1 |
+|   30001 | 西方見聞録     | マール＝コー＝ポロ |  1000 |          0 |
+|   40010 | 吾輩は犬である | 冬目漱岩           |   420 |          1 |
++---------+----------------+--------------------+-------+------------+
+4 rows in set (0.00 sec)
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