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WHAT IS NULL INDICATOR ? WERE IS THIS USED? AND IF IT IS
USED IN FILES CONCEPT? HOW DO WE USE IT?
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Answer Posted / nans
NULL indicator specifically used to find the value is present
or not in Table. For PRIMARY key the value should present.
When working with this key in program, there may be chance of
no value is present/value truncated. In such cases, NULL
indicator is used.
In file NULL indicator cannot be used.
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