question２です

【練習問題】 SQL/Question1/Questions1_中野.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', '冬目漱石', 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', '冬目漱石', 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 = '冬目漱石' AND price = 420;
+
+問7
+DELETE FROM book_table WHERE book_id = 20001;

【練習問題】 SQL/Question1/q1.txt

@@ -1,28 +0,0 @@
-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);
-
-SELECT * FROM book_table;
-
-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 book_id, book_name, author_name,price, sales_flag FROM book_table where sales_flag = 1;
-
-問6
-SELECT book_id, book_name, author_name,price, sales_flag FROM book_table where author_name = '冬目漱岩' AND price = 420;
-
-問7
-DELETE FROM book_table WHERE book_id = 20001;
-SELECT * FROM book_table;
-

【練習問題】 SQL/Question2/Questions2_中野.txt

@@ -0,0 +1,37 @@
+問1
+CREATE TABLE item_category(category_id INT AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL, PRIMARY KEY (category_id));
+
+INSERT INTO item_category (category_name) VALUES ('家具');
+INSERT INTO item_category (category_name) VALUES ('飲料');
+INSERT INTO item_category (category_name) VALUES ('食品');
+
+問2
+CREATE TABLE items(item_id INT AUTO_INCREMENT, name VARCHAR(256) NOT NULL, price INT NOT NULL, category_id INT, PRIMARY KEY (item_id));
+
+ALTER TABLE items ADD 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('げーたるーど2000 500ml', 370, 2);
+INSERT INTO items(name, price, category_id) VALUES('原子肉', 2500, 3);
+INSERT INTO items(name, price, category_id) VALUES('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 AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id;
+
+問4
+SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id ORDER BY items.price ASC;
+
+問5
+SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id WHERE item_category.category_name = '家具';
+
+問6
+SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id WHERE price >= 1000 AND price <= 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 AS name FROM item_category INNER JOIN items ON item_category.category_id = items.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 AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id WHERE name LIKE '%の%';

【練習問題】 SQL/Question2/q2.txt

@@ -1,29 +0,0 @@
-問1
-CREATE TABLE item_category(category_id INT PRIMARY KEY AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL);
-INSERT INTO item_category (category_name) VALUES(1,'家具');
-INSERT INTO item_category (category_name) VALUES('飲料');
-INSERT INTO item_category (category_name) VALUES('食品');
-
-問2
-CREATE TABLE item(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));
-
-問3
-SELECT item.category_id, item.item_id, item.name, item.price,item_category.category_name FROM item INNER JOIN item_category ON item.category_id = item_category.category_id;
-
-問4
-SELECT item.category_id, item.item_id, item.name, item.price,item_category.category_name FROM item INNER JOIN item_category ON item.category_id = item_category.category_id ORDER BY price ASC;
-
-問5
-SELECT item.category_id, item.item_id, item.name, item.price,item_category.category_name FROM item INNER JOIN item_category ON item.category_id = item_category.category_id WHERE category_name ='家具';
-
-問6
-SELECT item.category_id, item.item_id, item.name, item.price,item_category.category_name FROM item INNER JOIN item_category ON item.category_id = item_category.category_id WHERE item.price >= 1000 AND item.price <= 50000;
-
-問7
-SELECT COUNT(*) AS data_count FROM item;
-
-問8
-SELECT item.category_id, item.item_id, item.name, item.price,item_category.category_name FROM item INNER JOIN item_category ON item.category_id = item_category.category_id WHERE item.price = 150000;
-
-問9
-SELECT item.category_id, item.item_id, item.name, item.price,item_category.category_name FROM item INNER JOIN item_category ON item.category_id = item_category.category_id WHERE item.name LIKE '%の%'