Is a NULL value same as zero or a blank space?If not then what is the difference?

Started by Krishan, September 05, 2015, 02:35:41 PM

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Hubert

Hi everyone, I have a question to submit because I can not find the answer elsewhere, is a null value same as zero or a blank space? if not then what is the difference? Thank you kindly inform me please to the question.

Bartosz

1.A NULL value represents the absence of a value for a record in a field (others softwares call it also a missing value). 2.An empty value is a "field-formatted" value with no significant data in it. 3.NULL isn't allocated any memory, the string with NUll value is just a pointer