The UNION of two relations A and B consists of all rows that are either in relation A or in relation B or both.

Question

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This statement describes the definition of a Union operation in database theory. The Union of two relations (or tables) combines the rows from both tables, eliminating any duplicates. Therefore, all rows that are either in relation A or in relation B or both will be included in the Union result.

The UNION of Two Relations a and B Consists of All