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

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

@@ -1,19 +1,41 @@
 -- 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
 
 -- 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 p.product_name, p.list_price
+FROM products p JOIN products p2
+ON p.list_price = p2.list_price AND p.product_id != p2.product_id
+ORDER BY product_name
 
 -- Exercise 6
-
+SELECT c.category_name, p.product_id
+FROM categories c LEFT JOIN products p
+ON c.category_id = p.category_id
+WHERE p.product_id IS NULL
 
 -- Exercise 7