What will be the output of the following query?SELECT *FROM

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What will be the output of the following query?
```
SELECT *
FROM Employee
WHERE emp_id = NULL;
```

1. No output
2. Only those columns whose emp_id is NULL
3. Only those columns whose emp_id is not NULL
4. All of above
5. None of these

Correct Option: A

An expression can never be equate to NULL that is why there will be no output.