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  1. What does comparing a known value with NULL result into?
    1. a negative value
    2. null
    3. zero
    4. a positive value
    5. None of these
Correct Option: B

In MySQL, NULL is not comparable to other known values. It will result in a NULL when compared to any value. The following statement would result in four NULLs: ‘SELECT NULL = 0, NULL < 0, NULL <> 0, NULL > 0’.


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