Final answer:
The UNION operator is used in SQL to combine the result sets of two or more SELECT statements and only display unique results, removing any duplicates.
Step-by-step explanation:
The SQL operator that displays only the unique results of the combined SQL statements is UNION. The UNION operator is used to combine the result sets of two or more SELECT statements. It removes duplicate rows between the various SELECT statements. Each SELECT statement within the UNION must have the same number of columns in the result sets with similar data types. The DISTINCT keyword is not an operator like UNION, INTERSECT, or MINUS, but it can be used within SELECT statements to remove duplicates from the results of a single query.
The set operator UNION will display only the unique results of the combined SQL statements. The UNION operator combines the result sets of two or more SELECT statements into a single result set, removing any duplicate rows in the process. Here's an example:
SELECT column1 FROM table1
UNION
SELECT column1 FROM table2;
In this example, the result will only include the unique values from column1 in both table1 and table2.