Regarding the usage and rules of outer joins in SQL, specifically Oracle SQL:
* D. A condition representing an outer join cannot be linked to another condition using the OR logical operator: In SQL, when using the Oracle-specific (+) notation for outer joins, it is not permitted to combine this condition with another using the OR operator. The use of (+) imposes restrictions to ensure the join logic is correctly interpreted.
* E. The outer join operator (+) is used next to the column of the table without the matching rows:
The (+) symbol in Oracle's SQL syntax denotes the table that should include "null" where data does not exist to satisfy the join condition, effectively including rows that do not have a match in the joined table.
Incorrect options:
* A: The (+) operator cannot be used on both sides of a condition within the same join; it can only appear on one side to define which side of the join is the outer part.
* B: An outer join is used to retrieve all rows from one table and the matched rows from the other table; it does not solely retrieve rows that do not meet the join condition.
* C: The IN operator can be used in conditions involving an outer join, although specific rules and behaviors need to be considered depending on the SQL version and implementation.