document :How to retriev data from a single data

How_to_retrieve_data_from_a_single_table.sql

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+/*1*/
+SELECT
+	product_code,
+    product_name,
+    list_price,
+    discount_percent
+FROM
+	products
+ORDER BY list_price DESC;
+
+
+/*2*/
+SELECT 
+	concat(last_name,', ', first_name) AS full_name
+FROM 
+	customers
+WHERE 
+	last_name >= 'M%' 
+ORDER BY 
+	last_name;
+    
+/*3*/
+SELECT 
+	product_name,
+    list_price,
+    date_added
+FROM 
+	products
+WHERE 
+	list_price > 500 AND list_price < 2000;
+ORDER BY date_added DESC;
+/*4*/
+SELECT 
+	product_name,
+    list_price,
+    discount_percent,
+    ROUND((list_price*(discount_percent/100)),2) AS discount_amount,
+    ROUND(list_price -(list_price*(discount_percent/100)),2) AS discount_price
+FROM
+	products
+ORDER BY 
+	ROUND(list_price -(list_price*(discount_percent/100)),2DESC
+LIMIT 5;
+
+/*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_price DESC,((item_price - discount_amount) * quantity) DESC;
+
+/*6*/
+SELECT 
+	order_id,
+    order_date,
+    ship_date
+FROM
+	orders
+WHERE ship_date IS NULL;
+
+/*7*/
+SELECT 
+	now() AS today_unformatted,
+	date_format(now(),'%d-%b-%Y') AS today_formatted;
+
+/*8*/
+SELECT
+concat(100,' ','(dollars)') AS 'price',
+concat( '.07', ' ', '(7 percent)') AS 'tax_rate',
+100 * .07 AS 'tax_amount',
+100 + (100 * .07) AS 'total';