Final answer:
The outer join operator (+) is used for LEFT or RIGHT OUTER JOINs in Oracle SQL but cannot directly create FULL JOINS. To simulate a FULL JOIN, you would need to union a LEFT and RIGHT JOIN.
Step-by-step explanation:
The use of the outer join operator (+) is specific to Oracle SQL and facilitates creating LEFT or RIGHT OUTER JOIN operations. However, FULL JOINS cannot be created using this operator directly. The (+) operator only indicates that the table on the oposite side of the operator should be treated as optional, so if you place it on one side, you get a left outer join, and on the other, a right outer join. To simulate a full join in databases that don't support it natively without using a built-in FULL JOIN operation, you would have to combine a left join and a right join through a UNION query.
you cannot create FULL JOINS using the outer join operator (+).
The outer join operator in SQL is used to perform an outer join, which is a type of join that returns all the rows from both tables, including unmatched rows. However, it does not create a true full join.
To create a FULL JOIN, you can use the UNION operator to combine the results of a LEFT JOIN and a RIGHT JOIN. This will give you the equivalent of a full join, including all the rows from both tables.