about Null values

[willyamPax]

helo guys im still new to this stuff
ive read the manual online trying to look
what realy is null
still i need more info about it
i think base on ur experience about null values..
what i want to know is that what is the difference between the null values to not null values(meaning values that are not null)

[AeroX]

Null = nothing, blank, no data