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Snippet Name: FULL JOIN example and syntax

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

A full outer join combines the results of both left and right outer joins. The joined table will contain all records from both tables, and fill in NULLs for missing matches on either side.

Also see:
» ANSI Joins: FULL JOIN
» ANSI Joins: OUTER JOIN
» ANSI Joins: CROSS JOIN
» ANSI Joins: INNER JOIN
» Self-join example and syntax
» RIGHT JOIN example and syntax
» LEFT JOIN example and syntax
» INNER JOIN example and syntax

Comment: (none)

Language: PL/SQL
Highlight Mode: PLSQL
Last Modified: March 07th, 2009

SELECT column_name(s)
FROM table_name1
FULL JOIN table_name2 
ON table_name1.column_name=table_name2.column_name
 
-- or 
 
SELECT *  
FROM   employee 
       FULL OUTER JOIN department 
          ON employee.DepartmentID = department.DepartmentID
 
 
-- for example:
 
SELECT Person.LastName, Person.FirstName, Sales.OrderNo
FROM Person
FULL JOIN Sales
ON Person.P_Id=Sales.P_Id
ORDER BY Person.LastName 
 
 
-- alternate syntax:
 
SELECT *
FROM   employee 
       LEFT JOIN department 
          ON employee.DepartmentID = department.DepartmentID
UNION
SELECT *
FROM   employee
       RIGHT JOIN department
          ON employee.DepartmentID = department.DepartmentID
WHERE  employee.DepartmentID IS NULL
 


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