q２_更新

【練習問題】 SQL/Question1/q1.txt

@@ -0,0 +1,28 @@
+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/q2.txt

@@ -0,0 +1,29 @@
+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%'