In SQL, relations can contain null values, and comparisons with null values are treated as unknown. Suppose all comparisons with a null value are treated as false. Which of the following pairs is not equivalent?

Question

TuteeHUB · Accepted Answer

None of the above

TuteeHUB · Answer

x = 5 AND not(not(x = 5))

TuteeHUB · Answer

x = 5 AND x> 4 and x < 6, where x is an integer

TuteeHUB · Answer

x < 5 AND not (x = 5)

1.	In SQL, relations can contain null values, and comparisons with null values are treated as unknown. Suppose all comparisons with a null value are treated as false. Which of the following pairs is not equivalent?
A.	x = 5 AND not(not(x = 5))
B.	x = 5 AND x> 4 and x < 6, where x is an integer
C.	x < 5 AND not (x = 5)
D.	None of the above
Answer» D. None of the above

In SQL, relations can contain null values, and comparisons with null values are treated as unknown. Suppose all comparisons with a null value are treated as false. Which of the following pairs is not equivalent?

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