Right outer join

A right outer join is a method of combining tables. The result includes unmatched rows from only the table that is specified after the RIGHT OUTER JOIN clause.

If you are joining two tables and want the result set to include unmatched rows from only one table, use a LEFT OUTER JOIN clause or a RIGHT OUTER JOIN clause. The matching is based on the join condition.

The clause RIGHT OUTER JOIN includes rows from the table that is specified after RIGHT OUTER JOIN that have no matching values in the table that is specified before RIGHT OUTER JOIN.

As in an inner join, the join condition can be any simple or compound search condition that does not contain a subquery reference.

Example: The following example uses the tables in Sample data for joins. To include rows from the PRODUCTS table that have no corresponding rows in the PARTS table, execute this query:

SELECT PART, SUPPLIER, PRODUCTS.PROD#, PRODUCT, PRICE
  FROM PARTS RIGHT OUTER JOIN PRODUCTS
    ON PARTS.PROD# = PRODUCTS.PROD#
       AND PRODUCTS.PRICE>10.00;

The result table looks similar to the following output:

PART        SUPPLIER       PROD#     PRODUCT        PRICE
=======     ============   =====     ==========     ===== 
WIRE        ACWF            10       GENERATOR      45.75 
MAGNETS     BATEMAN         10       GENERATOR      45.75 
BLADES      ACE_STEEL      205       SAW            18.90
----------  ------------    30       RELAY           7.55 
----------  ------------   505       SCREWDRIVER     3.70

A row from the PARTS table is in the result table only if its product number matches the product number of a row in the PRODUCTS table and the price is greater than 10.00 for that row.

Because the PRODUCTS table can have rows with nonmatching product numbers in the result table, and the PRICE column is in the PRODUCTS table, rows in which PRICE is less than or equal to 10.00 are included in the result. The PARTS columns contain null values for these rows in the result table.