MCQOPTIONS
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MCQOPTIONS
| 1. |
What action does operator perform in relational algebra |
| A. | tOutput specified attributes from all rows of the input relation and remove duplicate tuples from the output |
| B. | tOutputs pairs of rows from the two input relations that have the same value on all attributes that have the same name |
| C. | tOutput all pairs of rows from the two input relations (regardless of whether or not they have the same values on common attributes) |
| D. | tReturn rows of the input relation that satisfy the predicate |
| Answer» B. tOutputs pairs of rows from the two input relations that have the same value on all attributes that have the same name | |