MCQOPTIONS
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MCQOPTIONS
| 1. |
The result of the UNION operation between R1 and R2 is a relation that includes |
| A. | All the tuples of R1 |
| B. | All the tuples of R2 |
| C. | All the tuples of R1 and R2 |
| D. | All the tuples of R1 and R2 which have common columns |
| Answer» D. All the tuples of R1 and R2 which have common columns | |