MCQs > IT & Programming > Computer Science > Suppose there are two relations: 'R1' and 'R2'. lf 'C1' and 'C2' are the selection conditions, and 'A1' and 'A2‘ are the attributes of the relation 'R1‘, then which of the given query transformations is/are correct? 1- 0C1 (0C1 (R11) '> Ocz (Gc2 1R1) 2- 0C1 ('A1 1R1) 7' 'A1 (0c1 (R11)

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Suppose there are two relations: 'R1' and 'R2'. lf 'C1' and 'C2' are the selection conditions, and 'A1' and 'A2‘ are the attributes of the relation 'R1‘, then which of the given query transformations is/are correct?
1- 0C1 (0C1 (R11) '> Ocz (Gc2 1R1)
2- 0C1 (“A1 1R1» 7" ”A1 (0c1 (R11)

Answer

Correct Answer:

2 only

Explanation:

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