SQL RIGHT JOIN Keyword
SQL RIGHT JOIN Keyword
The
RIGHT JOIN keyword Return all rows from the right table (table_name2), even
if there are no matches in the left table (table_name1).
SQL RIGHT JOIN Syntax
SELECT column_name(s)
FROM table_name1
RIGHT JOIN table_name2
ON table_name1.column_name=table_name2.column_name
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PS: In some databases RIGHT JOIN is called RIGHT OUTER JOIN.
SQL RIGHT JOIN Example
The "Persons" table:
P_Id |
LastName |
FirstName |
Address |
City |
1 |
Hansen |
Ola |
Timoteivn 10 |
Sandnes |
2 |
Svendson |
Tove |
Borgvn 23 |
Sandnes |
3 |
Pettersen |
Kari |
Storgt 20 |
Stavanger |
The "Orders" table:
O_Id |
OrderNo |
P_Id |
1 |
77895 |
3 |
2 |
44678 |
3 |
3 |
22456 |
1 |
4 |
24562 |
1 |
5 |
34764 |
15 |
Now we want to list all the orders with containing persons - if any, from the tables above.
We use
the following SELECT
statement:
SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo
FROM Persons
RIGHT JOIN Orders
ON Persons.P_Id=Orders.P_Id
ORDER BY Persons.LastName |
The result-set will look like this:
LastName |
FirstName |
OrderNo |
Hansen |
Ola |
22456 |
Hansen |
Ola |
24562 |
Pettersen |
Kari |
77895 |
Pettersen |
Kari |
44678 |
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34764 |
The RIGHT JOIN keyword returns all the rows from the right table (Orders), even if there are no
matches in the left table (Persons).
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