Union

Outputs the Union of two relations (tables). Optionally it outputs the result of a set operation obtained by the combination of Union with Not.

Options

Union: Merges two relations, removing duplicate tuples (rows).
Minus: Keeps tuples in the left (top) relation that do not occur in the second.
Intersect: Keeps only tuples that occur in both relations.
Difference: Keeps only tuples that occur in one relation or the other but not both.

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