SQL deixou a junção
SELECT Customers.customer_id, Customers.first_name, Orders.amount
FROM Customers
LEFT JOIN Orders
ON Customers.customer_id = Orders.customer;
SAMER SAEID
SELECT Customers.customer_id, Customers.first_name, Orders.amount
FROM Customers
LEFT JOIN Orders
ON Customers.customer_id = Orders.customer;SELECT *
FROM Table_A A
LEFT JOIN Table_B B
ON A.col = B.col;
RIGHT JOIN: Matching part from both
table and unmatching part from right table.123SELECT columns FROM table_A LEFT JOIN table_B ON join_conditionsXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXSELECT columns
FROM table1
LEFT JOIN table2
ON table1.column_name = table2.column_name;SQL> SELECT ID, NAME, AMOUNT, DATE
FROM CUSTOMERS
LEFT JOIN ORDERS
ON CUSTOMERS.ID = ORDERS.CUSTOMER_ID;