特になし

【練習問題】 SQL/Question1/Q1.txt

@@ -0,0 +1,25 @@
+問１
+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 author_name = 'マール＝コ＝ポロ' WHERE book_id = 30001;
+UPDATE book_table SET sales_flag = 0 WHERE book_id = 30001;
+
+問５
+SELECT * FROM book_table WHERE sales_flag = 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/Q2+α.txt

@@ -0,0 +1,3 @@
+問１
+SELECT items.商品ID,items.商品名,items.価格,item_category.カテゴリ名 FROM items INNER JOIN item_category ON items.category_id = item_category.category_id ORDER BY 商品ID ASC;
+

【練習問題】 SQL/Question2/Q2.txt

@@ -0,0 +1,29 @@
+問１
+CREATE TABLE item_category(category_id INT AUTO_INCREMENT PRIMARY KEY,category_name VARCHAR(256) NOT NULL);
+INSERT INTO item_category(category_name)VALUES('家具')('飲料'),('食品');
+
+問２
+CREATE TABLE items(item_id INT PRIMARY KEY AUTO_INCREMENT,name VARCHAR(256) NOT NULL,price INT NOT NULL,category_id INT, FOREIGN KEY(category_id)REFERENCES item_category(category_id));
+INSERT INTO items(name,price,category_id) VALUE('ローマのテーブル',150000,1),('げーたるーど2000 500ml',370,2),('原始肉',2500,3),('魅惑の椅子',100000,1);
+
+問３
+SELECT item_category.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;
+
+問４
+SELECT item_category.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;
+
+問５
+SELECT item_category.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 WHERE category_name='家具';
+
+問６
+SELECT item_category.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 WHERE price BETWEEN 1000 AND 50000;
+
+問７
+SELECT COUNT(*) AS data_count FROM items;
+
+問８
+SELECT item_category.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 WHERE price = (SELECT MAX(price) FROM items);
+
+問９
+SELECT item_category.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 WHERE name LIKE '%の%';
+

【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)