Answer Posted / pr@$@d
Null means unknown value
The value null can be regarded as an unknown value.
Therefore, the following select statement returns null:
select 5+7+null+9 from dual;
Note : A null can be assigned but it can not be equated
with anything: Even itself.
Regards,
-Pr@$@d.
prasadreddi@ymail.com
Is This Answer Correct ? | 18 Yes | 3 No |
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