Does NULL mean blank or zero?

Does NULL mean blank or zero?

Answer: Null indicates there is no value within a database field for a given record. It does not mean zero because zero is a value. Blank indicates there is a value within a database but the field is blank.

Are NULL values the same as spaces?

It is very important to understand that a NULL value is different than a zero value or a field that contains spaces, spaces are considered as values because they are strings (and sql can’t tell what the value of a string means to the user per se), but a NULL signifies a missing value, and hence has no value associated …

Is a NULL value blank?

Null can be a unknown value or an absence of a value, where as an Empty or Blank string is a value, but is just empty. Null can be used for string , Integer ,date , or any fields in a database where as Empty is used for string fields.

What is a NULL value and how does it differ from a zero value?

A ‘zero’ value refers to any numeric values, which may comprise to any of the integer, float, short or long etc data types, whereas a ‘null’ value refers to nothing, means there is an empty value, which does not indicate anything.

How is NULL different from blank space?

What is the difference between NULL and Blank? Null can be a unknown value or an absence of a value, where as an Empty or Blank string is a value, but is just empty. Null can be used for string , Integer ,date , or any fields in a database where as Empty is used for string fields.

Is space a null character?

The ‘null’ is a character that holds an ASCII value of zero (0x00). The ‘\0’ notation is used to distinguish it from the character zero, ‘0’, which has an ASCII value of 0x30 (or 48 decimal). So yes, the null character does occupy space – one byte – and holds a value of zero.

What is the difference between empty and NULL value?

The main difference between null and empty is that the null is used to refer to nothing while empty is used to refer to a unique string with zero length. A String refers to a sequence of characters.

IS NULL value same as zero right reason for your answer?

No, it’s not the same as null means a value that is unavailable, unassigned or unknown and zero is a defined value.

What is the difference between NULL and 0 in C?

NULL is a macro, defined in as a null pointer constant. \0 is a construction used to represent the null character, used to terminate a string. A null character is a byte which has all its bits set to 0.

What is the difference between zero and null character?

‘\0’ is defined to be a null character. It is a character with all bits set to zero. This has nothing to do with pointers. ‘\0’ is (like all character literals) an integer constant with the value zero.