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Sunday, 3 November 2013


The FULL JOIN keyword return rows when there is a match in one of the tables.

SQL FULL JOIN Syntax

SELECT column_name(s)
FROM table_name1
FULL JOIN table_name2
ON table_name1.column_name=table_name2.column_name

SQL FULL JOIN Example


The "Persons" table:

Id
LastName
FirstName
Address
City
1
Navis
Anto
Madras
TVL
2
Ji
Bala
Bombay
TVL
3
Christopher
Franklin
America
KK

The "Orders" table:

Id
OrderNo
Id
1
77895
3
2
44678
3
3
22456
1
4
24562
1
5
34764
15

Now we want to list all the persons and their orders, and all the orders with their persons.

We use the following SELECT statement:

SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo
FROM Persons
FULL JOIN Orders
ON Persons.Id=Orders.Id
ORDER BY Persons.LastName

The result-set will look like this:

LastName
FirstName
OrderNo
Navis
Anto
22456
Navis
Anto
24562
Christopher
Franklin
77895
Christopher
Franklin
44678
Ji
Bala



34764

The FULL JOIN keyword returns all the rows from the left table (Persons), and all the rows from the right table (Orders). If there are rows in "Persons" that do not have matches in "Orders", or if there are rows in "Orders" that do not have matches in "Persons", those rows will be listed as well.

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