oplossing How-to-retrieve-data-from-a-single-table.sql

How-to-retrieve-data-from-a-single-table.sql

@@ -1,22 +1,42 @@
 -- Exercise 1
-
+SELECT product_code, product_name, list_price, discount_percent
+FROM products
+ORDER BY list_price DESC;
 
 -- Exercise 2
-
+SELECT CONCAT(last_name, ', ', first_name) AS full_name
+FROM customers
+WHERE last_name >= 'M%'
+ORDER BY last_name ASC;
 
 -- Exercise 3
-
+SELECT product_name, list_price, date_added
+FROM products
+WHERE list_price > 500 AND list_price < 2000
+ORDER BY date_added DESC;
 
 -- Exercise 4
-
+SELECT product_name, list_price, discount_percent, 
+	   ROUND((discount_percent/100) * list_price, 2) AS discount_amount,
+       ROUND(list_price - (discount_percent/100) * list_price, 2) AS discount_price
+FROM products
+ORDER BY discount_price DESC
+LIMIT 5;
 
 -- Exercise 5
-
+SELECT item_id, item_price, discount_amount, quantity, item_price * quantity AS price_total,
+       discount_amount * quantity AS discount_total, (item_price - discount_amount) * quantity AS item_total
+FROM order_items
+WHERE ((item_price - discount_amount) * quantity) > 500
+ORDER BY item_total DESC;
 
 -- Exercise 6
-
+SELECT order_id, order_date, ship_date
+FROM orders
+WHERE ship_date IS NULL;
 
 -- Exercise 7
+SELECT NOW() AS today_unformatted, date_format(NOW(), '%d-%b-%Y') AS today_formatted;
 
-
+-- Exercise 8
+SELECT 100 AS price, 0.07 AS tax_rate, 100 * 0.07 AS tax_amount, 100 + (100 * 0.07) AS total;