SQL - Right Join

A RIGHT JOIN (also known as a right outer join) in SQL Server is the opposite of a LEFT JOIN. It retrieves all the rows from the right table and the matching rows from the left table based on a specified join condition. If there is no match, NULL values are returned for the columns of the left table.

The basic syntax for performing a RIGHT JOIN in SQL Server is as follows:

SELECT column_list
FROM table1
RIGHT JOIN table2 ON join_condition;

In this syntax, column_list represents the columns you want to select from the tables involved in the join operation. table1 is the left table, and table2 is the right table you want to join. The join_condition specifies the relationship between the tables.

The join condition is typically defined using the equality operator (=) to match values in the related columns of the joined tables. For example, if the related columns are "ID" in table1 and "ID" in table2, the join condition would be table1.ID = table2.ID.

Here's an example to illustrate the usage of a RIGHT JOIN:

Consider two tables, "Customers" and "Orders", with the following structures:

To retrieve all the orders along with the customer information (if available), you can use a RIGHT JOIN as follows:

SELECT Customers.Name, Orders.OrderID, Orders.Amount
FROM Customers
RIGHT JOIN Orders ON Customers.ID = Orders.CustID;

In the above query, we select the customer name from the "Customers" table and the order ID and amount from the "Orders" table. We perform a right join between the two tables, connecting them based on the customer ID (ID) column in the "Customers" table and the customer ID (CustID) column in the "Orders" table.

The right join ensures that all rows from the right table ("Orders") are included in the result set. If there is a match in the left table ("Customers"), the corresponding customer information is displayed. If there is no match, NULL values are returned for the columns of the left table.

The output of the query would be:

As you can see, the result set includes all the orders from the "Orders" table, along with the respective customer names (if available). In this case, Mike doesn't have a corresponding customer record, so NULL values are displayed for the customer-related columns.

In summary, a RIGHT JOIN in SQL Server allows you to retrieve all the rows from the right table, along with the matching rows from the left table based on a specified join condition. It's useful when you want to include all rows from one table, even