The FULL OUTER JOIN
command returns all rows when there is a match in either left table or right table.
The following SQL statement selects all customers, and all orders:
SELECT Customers.CustomerName, Orders.OrderID
FROM Customers
FULL OUTER JOIN Orders ON Customers.CustomerID=Orders.CustomerID
ORDER BY Customers.CustomerName;
Note: The FULL OUTER JOIN
keyword returns all the rows from the left table (Customers), and all the rows from the right table (Orders). If there are rows in "Customers" that do not have matches in "Orders", or if there are rows in "Orders" that do not have matches in "Customers", those rows will be listed as well.
截取页面反馈部分,让我们更快修复内容!也可以直接跳过填写反馈内容!