'How-to-retrieve-data-from-two-or-more-tables.sql' updaten

How-to-retrieve-data-from-two-or-more-tables.sql

@@ -1,19 +1,49 @@
 -- Exercise 1
-
+SELECT 
+category_name, 
+product_name, 
+list_price
+FROM categories c JOIN products p
+ON c.category_id = p.category_id
+ORDER BY category_name, product_name ASC;
 
 -- 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;