From d00e04b593397ca831d133ca14bab1bcaa5ece8b Mon Sep 17 00:00:00 2001
From: y-ogawa <26-y-ogawa-tmn@it-college.co.jp>
Date: Mon, 28 Sep 2026 12:59:06 +0900
Subject: [PATCH] =?UTF-8?q?Question1=E3=81=A7=E3=81=99?=
MIME-Version: 1.0
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---
 【練習問題】 SQL/Question1/Quetion1.sql | 146 ++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 【練習問題】 SQL/Question1/Quetion1.sql

diff --git a/【練習問題】 SQL/Question1/Quetion1.sql b/【練習問題】 SQL/Question1/Quetion1.sql
new file mode 100644
index 0000000..96ddcdc
--- /dev/null
+++ b/【練習問題】 SQL/Question1/Quetion1.sql	
@@ -0,0 +1,146 @@
+mysql> ALTER TABLE book_table MODIFY COLUMN book_id INT COMMENT '書籍ID';
+Query OK, 0 rows affected (0.01 sec)
+Records: 0  Duplicates: 0  Warnings: 0
+
+mysql>  ALTER TABLE book_table MODIFY COLUMN book_name VARCHAR(50) COMMENT '書籍名';
+Query OK, 0 rows affected (0.01 sec)
+Records: 0  Duplicates: 0  Warnings: 0
+
+mysql>  ALTER TABLE book_table MODIFY COLUMN author_name VARCHAR(50) COMMENT '著者';
+Query OK, 0 rows affected (0.01 sec)
+Records: 0  Duplicates: 0  Warnings: 0
+
+mysql> ALTER TABLE book_table MODIFY COLUMN price INT COMMENT '価格';
+Query OK, 0 rows affected (0.04 sec)
+Records: 0  Duplicates: 0  Warnings: 0
+
+mysql>  ALTER TABLE book_table MODIFY COLUMN sales_flag INT COMMENT '販売有無';
+Query OK, 0 rows affected (0.01 sec)
+Records: 0  Duplicates: 0  Warnings: 0
+
+mysql> INSERT INTO book_table VALUES(10001, TwoPeace, 三田英一郎, 420, 1);
+ERROR 1054 (42S22): Unknown column 'TwoPeace' in 'field list'
+mysql> INSERT INTO book_table VALUES(10001, 'TwoPeace', '三田英一郎', 420, 1);
+Query OK, 1 row affected (0.00 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 (0.00 sec)
+
+mysql> INSERT INTO book_table VALUES(10003, '坊ちゃま', '冬目漱岩', 460, 1);
+Query OK, 1 row affected (0.00 sec)
+
+mysql> UPDATE book_table SET book_id = 20001 WHERE 10003;
+Query OK, 3 rows affected (0.01 sec)
+Rows matched: 3  Changed: 3  Warnings: 0
+
+mysql> SELECT * FROM book_table;
++---------+--------------+-------------+-------+------------+
+| book_id | book_name    | author_name | price | sales_flag |
++---------+--------------+-------------+-------+------------+
+|   20001 | TwoPeace     | 三田英一郎  |   420 |          1 |
+|   20001 | 名探偵金田二 | 青山ふみや  |   460 |          1 |
+|   20001 | 坊ちゃま     | 冬目漱岩    |   460 |          1 |
++---------+--------------+-------------+-------+------------+
+3 rows in set (0.00 sec)
+
+mysql> UPDATE book_table SET book_id = 10001 WHERE price = 420;
+Query OK, 1 row affected (0.00 sec)
+Rows matched: 1  Changed: 1  Warnings: 0
+
+mysql> UPDATE book_table SET book_id = 10002 WHERE author_name = '青山ふみや';
+Query OK, 1 row affected (0.00 sec)
+Rows matched: 1  Changed: 1  Warnings: 0
+
+mysql> ^C
+mysql> SELECT * FROM book_table;
++---------+--------------+-------------+-------+------------+
+| book_id | book_name    | author_name | price | sales_flag |
++---------+--------------+-------------+-------+------------+
+|   10001 | TwoPeace     | 三田英一郎  |   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 |
++---------+--------------+-------------+-------+------------+
+3 rows in set (0.00 sec)
+
+mysql> INSERT INTO book_table VALUES(30001, '西方見聞録', '不明', 1000, 1);
+Query OK, 1 row affected (0.00 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       | 三田英一郎  |   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       | 三田英一郎  |
+| 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>  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>  UPDATE book_table SET sales_flag = 0 WHERE book_id = 30001;
+Query OK, 1 row affected (0.01 sec)
+Rows matched: 1  Changed: 1  Warnings: 0
+
+mysql>  SELECT * FROM book_table;
++---------+----------------+--------------------+-------+------------+
+| book_id | book_name      | author_name        | price | sales_flag |
++---------+----------------+--------------------+-------+------------+
+|   10001 | TwoPeace       | 三田英一郎         |   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     | マール＝コー＝ポロ |  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       | 三田英一郎  |   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> DELETE FROM book_table where book_id = 20001;
+Query OK, 1 row affected (0.00 sec)
+
+mysql> SELECT * FROM book_table;
++---------+----------------+--------------------+-------+------------+
+| book_id | book_name      | author_name        | price | sales_flag |
++---------+----------------+--------------------+-------+------------+
+|   10001 | TwoPeace       | 三田英一郎         |   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)
\ No newline at end of file