Logical-Reasoning
October 4, 2023Operating-Systems
October 4, 2023SQL
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Question 12
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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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x = 5 not AND (not (x = 5)
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x = 5 AND x > 4 and x < 6, where x is an integer
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x ≠ 5 AND not (x = 5)
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None of the above
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Question 12 Explanation:
For all values less than five, x<5 is true and if x=5 then it is false.
Correct Answer: C
Question 12 Explanation:
For all values less than five, x<5 is true and if x=5 then it is false.
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