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Exercise_1.6.sql

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+SELECT order_id, order_date, ship_date FROM orders WHERE ship_date IS NULL;

Exercise_1.7.sql

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+SELECT NOW() AS today_unformatted,
+DATE_FORMAT(NOW(), '%d-%M-%Y') AS today_formatted;

Exercise_1.8.sql

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+SELECT '100 (dollars)'  AS price, '.07 (7 percent)'  AS tax_rate, 100 * 0.07 AS tax_amount, (100 +(100*0.07)) AS total;

Exercise_2.1.sql

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+SELECT c.category_name as Category,
+p.product_name as Product, 
+p.list_price as Price 
+FROM
+products p
+INNER JOIN
+categories c ON p.category_id = c.category_id
+ORDER BY category_name, product_name ASC;

Exercise_2.2.sql

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+SELECT 
+    c.first_name AS First,
+    c.last_name AS Last,
+   a.line1 AS line1,
+   a.city AS city,
+   a.state AS state,
+   a.zip_code AS Address
+FROM
+    customers c
+        INNER JOIN
+    addresses a ON c.customer_id = a.customer_id
+WHERE
+    c.email_address = 'allan.sherwood@yahoo.com'
+ORDER BY Last, First;