CREATE TABLE item_category (
category_id INT PRIMARY KEY AUTO_INCREMENT COMMENT 'ƒJƒeƒSƒŠID',
category_name VARCHAR(256) NOT NULL COMMENT 'ƒJƒeƒSƒŠ–¼'
); 


INSERT INTO item_category VALUES (1,'‰Æ‹ï');
INSERT INTO item_category VALUES (2,'ˆù—¿');
INSERT INTO item_category VALUES (3,'�H•i');


CREATE TABLE items (
item_id INT PRIMARY KEY AUTO_INCREMENT COMMENT 'ƒAƒCƒeƒ€ID',
name VARCHAR(256) NOT NULL COMMENT 'ƒAƒCƒeƒ€–¼',
price INT NOT NULL COMMENT '‰¿Ši',
category_id INT COMMENT 'ƒJƒeƒSƒŠID',
FOREIGN KEY (category_id) REFERENCES item_category(category_id)
);

INSERT INTO items VALUES (1,'ƒ��[ƒ}‚̃e�[ƒuƒ‹',150000,1);
INSERT INTO items VALUES (2,'‚°�[‚½‚é�[‚Ç2000 500ml',370,2);
INSERT INTO items VALUES (3,'Œ´Žn“÷',2500,3);
INSERT INTO items VALUES (4,'–£˜f‚̈֎q',100000,1);

SELECT item_category.category_id,items.item_id,items.name,items.price,item_category.category_name AS name  
FROM item_category LEFT OUTER JOIN items ON items.category_id = item_category.category_id;

UPDATE items SET price = 100000 WHERE items.name = '–£˜f‚̈֎q';

SELECT item_category.category_id,items.item_id,items.name,items.price,item_category.category_name AS name  
FROM item_category LEFT OUTER JOIN items ON items.category_id = item_category.category_id 
ORDER BY items.price;

SELECT item_category.category_id,items.item_id,items.name,items.price,item_category.category_name AS name   
FROM item_category LEFT OUTER JOIN items ON items.category_id = item_category.category_id WHERE item_category.category_id = 1;

SELECT item_category.category_id,items.item_id,items.name,items.price,item_category.category_name AS name   
FROM item_category LEFT OUTER JOIN items ON items.category_id = item_category.category_id WHERE items.price >=1000 and items.price <=50000;

SELECT COUNT(*)AS data_count FROM items;

--Q8--
SELECT item_category.category_id,items.item_id,items.name,items.price,item_category.category_name AS name   
FROM item_category LEFT OUTER JOIN items ON items.category_id = item_category.category_id
WHERE items.price = (SELECT MAX(price) FROM items);

---Q9---
SELECT item_category.category_id,items.item_id,items.name,items.price,item_category.category_name AS name   
FROM item_category LEFT OUTER JOIN items ON items.category_id = item_category.category_id
WHERE items.name LIKE '%‚Ì%';