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

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

@@ -1,24 +1,38 @@
 -- Exercise 1
 SELECT product_code, product_name, list_price, discount_percent
 FROM products
-ORDER BY list_price DESC;
+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
 
 -- Exercise 3
-
+SELECT product_name, list_price, date_added
+FROM products
+WHERE list_price BETWEEN 500 AND 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
 
 
 -- Exercise 6
-
+SELECT order_id, order_date, ship_date
+FROM orders
+WHERE ship_date IS NULL
 
 -- Exercise 7
 
 
+-- Exercise 8
+SELECT '100 (dollars)' AS price, '.07 (7 percent)' AS tax_rate, 7.00 AS tax_amount, 100 + (100 * 0.07) AS total