my-guitar-shop-database-exersices/How-to-retrieve-data-from-two-or-more-tables.sql

-- Exercise 1
SELECT category_name, product_name, list_price
FROM products p JOIN categories c
	ON c.category_id = p.category_id
ORDER BY category_name, product_name;

-- Exercise 2
SELECT first_name, last_name, line1, city, state, zip_code
FROM customers c JOIN addresses a
	ON c.customer_id = a.customer_id
WHERE email_address LIKE 'allan.sherwood@yahoo.com';

-- Exercise 3
SELECT first_name, last_name, line1, city, state, zip_code
FROM customers c JOIN addresses a
	ON c.customer_id = a.customer_id
	AND c.shipping_address_id = address_id;

-- Exercise 4
SELECT last_name, first_name, order_date, product_name, item_price, discount_amount, quantity
FROM customers c JOIN orders o ON c.customer_id = o.customer_id
	JOIN order_items i ON i.order_id = o.order_id
	JOIN products p ON p.product_id = i.product_id
ORDER BY last_name, order_date, product_name;

-- Exercise 5
SELECT p1.product_name, p2.list_price
FROM products p1 JOIN products p2
	ON p1.product_id <> p2.product_id
    AND p1.list_price = p2.list_price
ORDER BY product_name;

-- Exercise 6
SELECT * FROM categories c JOIN products p
	ON p.category_id = c.category_id
WHERE p.product_id IS NULL;

-- Exercise 7
SELECT 'SHIPPED' AS ship_status, order_id, order_date
FROM orders
WHERE ship_date IS NOT NULL
UNION
SELECT 'NOT SHIPPED' AS ship_status, order_id, order_date
FROM orders
WHERE ship_date IS NULL
ORDER BY order_date;