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Differences between null and not null values?

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Relevant answers:

What is the difference between 0 and null?
Nothing - 0, Zero and null are the same things
What is Difference between null macro and null pointer?
I'll assume that you're asking your question for C type language programming. A NULL pointer is a pointer that's guarnteed to point to nothing. This may be 0 in a UNIX/Linux system or some other...
What is a null macro what is the difference between a null pointer and a null macro?
NULL Macro is simply what is defined as 0 in a macro provided by the library Null pointer is a pointer which has 0 or NULL value stored and points to nowhwere still it points to 0x00 i.e. the first...
What is the difference between null in c and in oracle?
A NULL in C is a pointer with 0 value, which cannot be a valid address. A null in Oracle is the condition of not having a value, such as a field in a row being null, meaning that it does not have a...
What is NULL value?
It means "nothing", there is no data provided at all; just an empty value. Contrary to the previous edit it does not mean "zero", "none" or "blank"; as zero is a number and none and blank can be...