Question 2 Done

【練習問題】 SQL/Question1/Question1.txt

@@ -0,0 +1,23 @@
+問１
+テーブル作成
+ CREATE TABLE book_table (book_id INT, book_name VARCHAR(50), author_name VARCHAR(50), price INT, sales_flag INT);
+問２
+ INSERT INTO book_table VALUES (10001, 'TwoPeace', '三田英一郎', 420,1);
+INSERT INTO book_table VALUES (10002, '名探偵金田二', '青山ふみや', 460,1);
+INSERT INTO book_table VALUES (20001, '坊ちゃま', '冬目漱岩', 460,1);
+INSERT INTO book_table VALUES (30001, '西方見聞録', '不明', 1000,1);
+INSERT INTO book_table VALUES (40010, '吾輩は犬である', '冬目漱岩', 420,1);
+
+問３
+SELECT book_name , author_name FROM book_table;
+
+問４
+ UPDATE book_table SET sales_flag= 0 WHERE book_id =30001;
+
+問５
+SELECT * FROM book_table WHERE sales_flag LIKE '%1%';
+
+問６
+SELECT * FROM book_table WHERE author_name = '冬目漱岩' AND price = 420;
+問７
+ DELETE FROM book_table WHERE book_id = 20001;

【練習問題】 SQL/Question1/Quetion1.sql

@@ -1,146 +0,0 @@
-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)

【練習問題】 SQL/Question2/Question2.sql

@@ -1,122 +0,0 @@
-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 (0.05 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 (0.00 sec)
-
-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 (0.05 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 (0.05 sec)
-
-mysql>  SELECT * FROM item_category LEFT JOIN items USING(category_id);
-+-------------+---------------+---------+------------------------+--------+
-| category_id | category_name | item_id | name                   | price  |
-+-------------+---------------+---------+------------------------+--------+
-|           1 | 家具          |       4 | 魅惑の椅子             | 100000 |
-|           1 | 家具          |       1 | ローマのテーブル       | 150000 |
-|           2 | 飲料          |       2 | げーたるーど2000 500ml |    370 |
-|           3 | 食品          |       3 | 原始肉                 |   2500 |
-+-------------+---------------+---------+------------------------+--------+
-4 rows in set (0.00 sec)
-
-mysql> SELECT * FROM item_category RIGHT JOIN items USING(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 * FROM item_category RIGHT JOIN items USING(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 * FROM item_category RIGHT JOIN items 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 item_category RIGHT JOIN items USING(category_id) where price > 1000 AND 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 (0.01 sec)
-
-mysql>  SELECT * FROM item_category RIGHT JOIN items USING(category_id) WHERE price = (SELECT MAX(price) FROM items);
-+-------------+---------+------------------+--------+---------------+
-| 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 item_category RIGHT JOIN items USING(category_id) WHERE name LIKE '%の%';
-+-------------+---------+------------------+--------+---------------+
-| 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)

【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)
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+