SQL RIGHT JOIN

The SQL Right Join returns all the records (or rows) present in the Right table and matching rows from the Left table.

NOTE: All the Unmatched rows from the Left table will be filled with NULL Values.

SQL RIGHT JOIN Syntax

The basic syntax of the Right Join in SQL Server is as follows:

TIP: In SQL Server, Right Outer join can also be called as Right Join so it is optional to use the Outer Keyword.

Let us see the visual representation of the Right Outer join for better understanding.

From the above image you can understand easily that, Right Outer join displays all the records present in Table 2 and matching records from Table 1

In this article we will show you, How to write Right Join in SQL Server 2014. For this, We are going to use two tables (Employee and Department) present in our [SQL Server Tutorials] Database.

Data present in the Employee Table is:

Data present in the Department Table is:

SQL Right Join – Selecting All Columns

The following SQL Query will display all the columns present in Employees and Department tables

T-SQL CODE

OUTPUT

If you observe the above screenshot, Although we have 15 records in Employee table, Right join is displaying 13 records. This is because, Department Id for 14th and 15th records in Employee table are NULLS so there is no matching records in right table.

If you observe the 8th and 9th records, they are displaying NULL values because in Employee table there are no matching records for Department Id 3, 4 (Module Lead and Team Lead) in the Department table so they are simply replaced by NULLS.

NOTE: The [Department ID] column is repeated twice, which is annoying to the user. By selecting individual column names we can avoid unwanted columns so, Please avoid SELECT * Statements in Right Join

SQL Right Join – Selecting Few Columns

Please place the required columns after the SQL SELECT Statement to avoid unwanted columns

T-SQL CODE

OUTPUT

Above query will perfectly work as long as the column names from both tables (Employee and Department) are different like above. What happens if we have same Column names in both the tables? Well, you will end up in a mess. Let us see how to resolve the issue.

The following query is using table name before the column name and also used the ALIAS names to rename the column names. By this approach we can inform the Database that we are looking for columns belonging to particular table.

T-SQL CODE

OUTPUT

Although we don’t have any common column names, Imagine we have [DepartmentName] column in Employee as well and we want to display Department Columns in both the tables.

We can simply write as

NOTE: It is always best practice to use the table name before the Column name in Joins. For example, SELECT Employee.Firstname

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