Right Outer Join Oracle - oracle tutorial - sql tutorial




Oracle right outer join

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What is Right outer join in Oracle ?

  • Right outer join returns all rows from the RIGHT-hand table specified in the ON condition and only those rows from the other table where the joined fields are equal (join condition is met).
 representation of right outer join

Syntax :

SELECT columns
FROM table1
RIGHT [OUTER] JOIN table2
ON table1.column = table2.column;
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Example :

SELECT orders.orderid, orders.Customer_Name, wikitechy_employee.name
FROM wikitechy_employee
RIGHT OUTER JOIN orders
ON wikitechy_employee.id = orders.id;
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Sample Database:

  • We have a table called wikitechy_employee with four fields (id, name, position, and city). It contains the following data:
 output of right outer join oracle
  • We have another table called orders with three fields (id, customer_name, and orderid).
 output2 of right outer join oracle

Right Outer Join:

 right outer join output and query
    • The above oracle sql query would return all rows from the orders table and only those rows from the wikitechy_employee table where the joined fields are equal.
    • If a id value in the orders table does not exist in the wikitechy_employee table, all fields in the wikitechy_employee table will display as <null>in the result set.

Oracle ALL Joins

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