UNION, INTERSECT, and EXCEPT Options

The following query engine hints are available for the three set operations UNION, INTERSECT, and EXCEPT:

DISABLE_PUSH (UNION, INTERSECT, and EXCEPT Option)
FORCE_DISK (UNION, INTERSECT, and EXCEPT Option)
PARALLEL (UNION, INTERSECT, and EXCEPT Option)
ROUND_ROBIN (UNION, INTERSECT, and EXCEPT Option)
SORT_MERGE (UNION, INTERSECT, and EXCEPT Option)