How Does Removing the Oracle ( ) Outer Join Operator Affect Query Results?

Oracle's ( ) Outer Join Operator: A Closer Look

Oracle SQL's ( ) operator, used within JOIN statements, defines an outer join. This is a departure from the ANSI-89 standard, which employs commas to separate table references in the FROM clause and lacks explicit outer join syntax.

Consequences of Removing the ( ) Operator

Eliminating the ( ) operator transforms the outer join into an inner join. Inner joins only return rows where values match across both tables. Removing ( ) would therefore filter out any rows from the second table (let's say, table B) that lack a corresponding match in the first table (table A).

Using the ( ) Operator: Prerequisites

Employing the ( ) operator typically doesn't demand specific database configurations or indexes. However, Oracle's documentation advises using the standard OUTER JOIN syntax for better compatibility and versatility.

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