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NULL Values

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  1. What will be the output of the following query?
    SELECT First_name
    FROM Employee
    WHERE emp_id != 6 OR emp_id IS  NULL;
    1. Only those names whose emp_id is not equal to 6
    2. Only those names whose emp_id is equal to 6
    3. Only those names whose emp_id is not equal to 6 or emp_id with NULL values
    4. All of above
    5. None of these
Correct Option: C

Only those names whose emp_id is not equal to 6 or emp_id with NULL values


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