made exercises

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

@@ -1,22 +1,69 @@
+    -- 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 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
 
+    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;