Oracle PL/SQL tutorial :SQL Right Join Example

As you have learned about the SQL LEFT JOIN where all the rows are returned from the left table ever when there is no match from the right table, the same case is with the SQL RIGHT JOIN, but here all the rows from the right side table is returned without matching the left side table. Let start with the syntax:

Syntax:-
SELECT column_name(s)
FROM table_name1
RIGHT JOIN table_name2
ON table_name1.column_name=table_name2.column_name;

Now look at the two tables, TABLE A and TABLE B:

TABLE A

P_Id	LastName	FirstName	Address	City
1	ABC	DEF	Street 10	City 1
2	GHI	JKL	Street 20	City 2
3	MNO	PQR	Street 30	City 3

TABLE B

O_Id	OrderNo	P_Id
1	778951	3
2	446781	3
3	224561	1
4	245621	1
5	347641	15

Now we apply the SQL RIGHT JOIN query:

SELECT TABLE A.LastName, TABLE A.FirstName, TABLE B.OrderNo
FROM TABLE A
RIGHT JOIN TABLE B
ON TABLE A.P_Id=TABLE B.P_Id
ORDER BY TABLE A.LastName;

The above query will return all the rows from TABLE A even there is no match with TABLE B. That does not mean that no check for common rows are made. The result of the above query will be:

OUTPUT

LastName	FirstName	OrderNo
ABC	DEF	224561
ABC	DEF	245621
MNO	PQR	778951
MNO	PQR	446781
		347641

NOTE: In some places SQL RIGHT JOIN is also refered as RIGHT OUTER JOIN.