How to resolve ORA-01417 Error Message in Oracle database

Learn the reason and how to unravel the ORA-01417 error message in Oracle.

Description

When you encounter an ORA-01417 error, the following error message will appear:

ORA-01417: a desk can also be outer joined to at most one other table

Cause

You tried to perform an outer join to the identical table from more than one other table.

Resolution

The option(s) to resolve this Oracle error are:

Option #1

Correct your SQL so that you are solely performing an outer be a part of to the identical table from solely one different table.

For example, if you tried to execute the following SQL statement:

SELECT suppliers.supplier_id, suppliers.supplier_name, orders.order_id
FROM suppliers, orders, products
WHERE suppliers.supplier_id = orders.supplier_id(+)
AND products.supplier_id = orders.supplier_id(+);

You would receive the following error message:

You’ve tried to perform an outer join to the orders desk from both the suppliers and products tables.

You may want to right this SQL assertion through disposing of the 2d outer join. For example:

SELECT suppliers.supplier_id, suppliers.supplier_name, orders.order_id
FROM suppliers, orders, products
WHERE suppliers.supplier_id = orders.supplier_id(+)
AND products.supplier_id = orders.supplier_id;