Note: please see here for an animated visual of how left/right joins work.
-- OUR FIRST RIGHT JOIN (seems the same as a left join?)
SELECT * FROM customers
RIGHT JOIN orders
ON customers.id = orders.customer_id;
-- ALTERING OUR SCHEMA to allow for a better example (optional)
CREATE TABLE customers(
id INT AUTO_INCREMENT PRIMARY KEY,
first_name VARCHAR(100),
last_name VARCHAR(100),
email VARCHAR(100)
);
CREATE TABLE orders(
id INT AUTO_INCREMENT PRIMARY KEY,
order_date DATE,
amount DECIMAL(8,2),
customer_id INT
);-- INSERTING NEW DATA (no longer bound by foreign key constraint)
INSERT INTO customers (first_name, last_name, email)
VALUES ('Boy', 'George', 'george@gmail.com'),
('George', 'Michael', 'gm@gmail.com'),
('David', 'Bowie', 'david@gmail.com'),
('Blue', 'Steele', 'blue@gmail.com'),
('Bette', 'Davis', 'bette@aol.com');
INSERT INTO orders (order_date, amount, customer_id)
VALUES ('2016/02/10', 99.99, 1),
('2017/11/11', 35.50, 1),
('2014/12/12', 800.67, 2),
('2015/01/03', 12.50, 2),
('1999/04/11', 450.25, 5);
INSERT INTO orders (order_date, amount, customer_id) VALUES
('2017/11/05', 23.45, 45),
(CURDATE(), 777.77, 109);